{"id":1801,"date":"2026-08-11T10:36:30","date_gmt":"2026-08-11T02:36:30","guid":{"rendered":"https:\/\/smt-special-gas.com\/?page_id=1801"},"modified":"2026-08-29T08:59:47","modified_gmt":"2026-08-29T00:59:47","slug":"isotope-gas","status":"publish","type":"page","link":"https:\/\/smt-special-gas.com\/zh\/isotope-gas\/","title":{"rendered":"Isotope Gas"},"content":{"rendered":"<div data-spectra-id=\"spectra-mso1s8n9-ma3j3b\"\tclass=\"spectra-is-root-container alignfull spectra-overlay-color wp-block-spectra-container is-layout-flow wp-block-spectra-container-is-layout-flow\" data-orientation=\"horizontal\"\t>\n\t\n\n<!-- =========================================================\n     SMT PRODUCT PAGE\n     SCROLL JUMP FIX\n     \n     \u89e3\u51b3\uff1a\n     1. \u9875\u9762\u6253\u5f00\u540e\u81ea\u52a8\u5f80\u4e0b\u8df3\n     2. \u4e0a\u4e00\u4e2a\u4ea7\u54c1\u9875\u6eda\u52a8\u4f4d\u7f6e\u88ab\u5e26\u5230\u65b0\u9875\u9762\n     3. 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&quot;href&quot;\n        );\n\n\n      if(!href){\n        return;\n      }\n\n\n\n      \/*\n       \u6392\u9664 # \u951a\u70b9\n      *\/\n\n      if(\n        href.charAt(0)\n        ===\n        &quot;#&quot;\n      ){\n        return;\n      }\n\n\n\n      var url;\n\n\n      try{\n\n        url =\n          new URL(\n            href,\n            window.location.origin\n          );\n\n      }\n      catch(e){\n\n        return;\n\n      }\n\n\n\n      \/*\n       \u53ea\u5904\u7406\u672c\u7ad9\u94fe\u63a5\n      *\/\n\n      if(\n        url.origin !==\n        window.location.origin\n      ){\n        return;\n      }\n\n\n\n      var targetPath =\n        url.pathname\n        .replace(\/\\\/+$\/,&quot;&quot;)\n        + &quot;\/&quot;;\n\n\n\n      \/*\n       \u70b9\u51fb\u5176\u5b83\u4ea7\u54c1\u5206\u7c7b\u65f6\n       \u8bbe\u7f6e\u6807\u8bb0\n      *\/\n\n      if(\n        productPages.indexOf(\n          targetPath\n        )\n        !==\n        -1\n      ){\n\n        try{\n\n          sessionStorage.setItem(\n            &quot;smtProductForceTop&quot;,\n            &quot;1&quot;\n          );\n\n        }\n        catch(e){}\n\n\n\n        try{\n\n          if(\n            &quot;scrollRestoration&quot;\n            in\n            window.history\n          ){\n\n            window.history.scrollRestoration =\n              &quot;manual&quot;;\n\n          }\n\n        }\n        catch(e){}\n\n      }\n\n    },\n    true\n  );\n\n\n\n})();\n<\/script>\n<!-- =========================================================\n     SMART SPECIAL GAS\n     ISOTOPE GAS CATEGORY PAGE\n     LARGE VERSION + CHINESE NAMES\n========================================================= -->\n\n<section class=\"smt-iso-page\">\n\n\n  <!-- =====================================================\n       HERO\n  ====================================================== -->\n\n  <div class=\"smt-iso-hero\">\n\n    <div class=\"smt-iso-hero-bg\"><\/div>\n    <div class=\"smt-iso-hero-overlay\"><\/div>\n\n    <div class=\"smt-iso-hero-inner\">\n\n      <div class=\"smt-iso-hero-kicker\">\n        SPECIALTY GAS PRODUCTS\n      <\/div>\n\n      <h1>\n        Isotope Gas\n      <\/h1>\n\n      <p>\n        Stable isotope gases and isotope-labeled compounds\n        for scientific research, analytical testing\n        and specialized industrial applications.\n      <\/p>\n\n    <\/div>\n\n  <\/div>\n\n\n\n  <!-- =====================================================\n       MAIN\n  ====================================================== -->\n\n  <div class=\"smt-iso-main\">\n\n    <div class=\"smt-iso-container\">\n\n\n      <!-- ===================================================\n           LEFT SIDEBAR\n      ==================================================== -->\n\n      <aside class=\"smt-iso-sidebar\">\n\n\n        <div class=\"smt-iso-side-head\">\n\n          <small>\n            PRODUCTS\n          <\/small>\n\n          <strong>\n            Product Center\n          <\/strong>\n\n          <i><\/i>\n\n        <\/div>\n\n\n\n        <nav class=\"smt-iso-side-nav\">\n\n          <a href=\"\/products\/\">\n            <span>All Products<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/mixed-gas\/\">\n            <span>Mixed Gas<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/high-purity-gas\/\">\n            <span>High Purity Gas<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/electronic-gas\/\">\n            <span>Electronic Gas<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/isotope-gas\/\" class=\"active\">\n            <span>Isotope Gas<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/electronic-chemicals\/\">\n            <span>Electronic Chemicals<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/silicone-chemical-auxiliaries\/\">\n            <span>Silicone Chemical Auxiliaries<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/gas-pipeline-supporting\/\">\n            <span>Gas Pipeline Supporting<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/gas-regulator\/\">\n            <span>Gas Regulators<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n          <a href=\"\/gas-cylinder\/\">\n            <span>Gas Cylinders<\/span>\n            <b>\u2192<\/b>\n          <\/a>\n\n        <\/nav>\n\n      <\/aside>\n\n\n\n      <!-- ===================================================\n           RIGHT CONTENT\n      ==================================================== -->\n\n      <main class=\"smt-iso-content\">\n\n\n        <!-- BREADCRUMB -->\n\n        <div class=\"smt-iso-breadcrumb\">\n\n          <a href=\"\/\">\n            Home\n          <\/a>\n\n          <span>\u203a<\/span>\n\n          <a href=\"\/products\/\">\n            Products\n          <\/a>\n\n          <span>\u203a<\/span>\n\n          <strong>\n            Isotope Gas\n          <\/strong>\n\n        <\/div>\n\n\n\n        <!-- =================================================\n             INTRO\n        ================================================== -->\n\n        <div class=\"smt-iso-intro\">\n\n          <div class=\"smt-iso-intro-title\">\n\n            <small>\n              STABLE ISOTOPE GAS\n            <\/small>\n\n            <h2>\n              Isotope Gas\n              <span>Product Range<\/span>\n            <\/h2>\n\n          <\/div>\n\n\n          <div class=\"smt-iso-intro-copy\">\n\n            <p>\n              Our isotope portfolio includes oxygen,\n              carbon dioxide, methane, nitrogen,\n              noble gas and other isotope-labeled products\n              with specified isotope abundance.\n            <\/p>\n\n          <\/div>\n\n        <\/div>\n\n\n\n        <!-- =================================================\n             GRID\n        ================================================== -->\n\n        <div class=\"smt-iso-grid\">\n\n\n          <!-- =================================================\n               01 OXYGEN-18O2\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"1\">\n\n            <a href=\"https:\/\/smt-special-gas.com\/oxygen-18o\u2082\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n\n              <i class=\"smt-iso-dot dot-a\"><\/i>\n              <i class=\"smt-iso-dot dot-b\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>18<\/sup>O<sub>2<\/sub>\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Oxygen-18O\u2082\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 01\n              <\/div>\n\n              <h3>\n                Oxygen-18O\u2082\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c27\u6c14-18O\u2082\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Oxygen<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u2078O<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>97 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"https:\/\/smt-special-gas.com\/oxygen-18o\u2082\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               02 CARBON-13C DIOXIDE\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"1\">\n\n            <a href=\"\/carbon-13c-dioxide\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n\n              <i class=\"smt-iso-dot dot-c\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>13<\/sup>CO<sub>2<\/sub>\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Carbon-13C Dioxide\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 02\n              <\/div>\n\n              <h3>\n                Carbon-13C Dioxide\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u78b3-13C\u4e8c\u6c27\u5316\u78b3\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>CO\u2082<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u00b3C<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/carbon-13c-dioxide\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               03 METHANE-13C\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"1\">\n\n            <a href=\"\/methane-13c\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n\n              <i class=\"smt-iso-dot dot-a\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>13<\/sup>CH<sub>4<\/sub>\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Methane-13C\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 03\n              <\/div>\n\n              <h3>\n                Methane-13C\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u7532\u70f7-13C\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Methane<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u00b3C<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/methane-13c\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               04 NITROGEN-15N2\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"1\">\n\n            <a href=\"\/nitrogen-15n2\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n\n              <i class=\"smt-iso-dot dot-b\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>15<\/sup>N<sub>2<\/sub>\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Nitrogen-15N\u2082\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 04\n              <\/div>\n\n              <h3>\n                Nitrogen-15N\u2082\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c2e\u6c14-15N\u2082\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Nitrogen<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u2075N<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/nitrogen-15n2\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               05 KRYPTON-78\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"1\">\n\n            <a href=\"\/krypton-78\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n\n              <i class=\"smt-iso-dot dot-c\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>78<\/sup>Kr\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Krypton-78\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 05\n              <\/div>\n\n              <h3>\n                Krypton-78\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c2a-78\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Krypton<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u2077\u2078Kr<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/krypton-78\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               06 NEON-20\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"1\">\n\n            <a href=\"\/neon-20\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n\n              <i class=\"smt-iso-dot dot-a\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>20<\/sup>Ne\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Neon-20\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 06\n              <\/div>\n\n              <h3>\n                Neon-20\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c16-20\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Neon<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b2\u2070Ne<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/neon-20\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               PAGE 2\n               07 HELIUM-3\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"2\">\n\n            <a href=\"\/helium-3\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n\n              <i class=\"smt-iso-dot dot-c\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>3<\/sup>He\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Helium-3\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 07\n              <\/div>\n\n              <h3>\n                Helium-3\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c26-3\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Helium<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b3He<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99.9 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/helium-3\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               08 ETHYLENE-13C1\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"2\">\n\n            <a href=\"\/ethylene-13c1\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n\n              <i class=\"smt-iso-dot dot-b\"><\/i>\n\n              <div class=\"smt-iso-formula smt-iso-formula-long\">\n                C<sub>2<\/sub>H<sub>4<\/sub>&#8211;<sup>13<\/sup>C\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Ethylene-13C1\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 08\n              <\/div>\n\n              <h3>\n                Ethylene-13C1\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u4e59\u70ef-13C1\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Ethylene<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u00b3C<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/ethylene-13c1\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               09 CARBON-13C MONOXIDE\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"2\">\n\n            <a href=\"\/carbon-13c-monoxide\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n\n              <i class=\"smt-iso-dot dot-a\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>13<\/sup>CO\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Carbon-13C Monoxide\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 09\n              <\/div>\n\n              <h3>\n                Carbon-13C Monoxide\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u78b3-13C\u4e00\u6c27\u5316\u78b3\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>CO<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u00b3C<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/carbon-13c-monoxide\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               10 ACETYLENE-13C2\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"2\">\n\n            <a href=\"\/acetylene-13c2\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n\n              <i class=\"smt-iso-dot dot-c\"><\/i>\n\n              <div class=\"smt-iso-formula smt-iso-formula-long\">\n                <sup>13<\/sup>C<sub>2<\/sub>H<sub>2<\/sub>\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Acetylene-13C2\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 10\n              <\/div>\n\n              <h3>\n                Acetylene-13C2\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u4e59\u7094-13C2\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Acetylene<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u00b3C<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/acetylene-13c2\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               11 AMMONIA-15N\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"2\">\n\n            <a href=\"\/ammonia-15n\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n              <span class=\"smt-iso-orbit orbit-a\"><\/span>\n\n              <i class=\"smt-iso-dot dot-b\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>15<\/sup>NH<sub>3<\/sub>\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Ammonia-15N\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 11\n              <\/div>\n\n              <h3>\n                Ammonia-15N\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c28\u6c14-15N\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Ammonia<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u2075N<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>98 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/ammonia-15n\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n\n          <!-- =================================================\n               12 XENON-124\n          ================================================== -->\n\n          <article class=\"smt-iso-card\" data-page=\"2\">\n\n            <a href=\"\/xenon-124\/\" class=\"smt-iso-visual\">\n\n              <span class=\"smt-iso-orbit orbit-c\"><\/span>\n              <span class=\"smt-iso-orbit orbit-b\"><\/span>\n\n              <i class=\"smt-iso-dot dot-a\"><\/i>\n\n              <div class=\"smt-iso-formula\">\n                <sup>124<\/sup>Xe\n              <\/div>\n\n              <div class=\"smt-iso-visual-name\">\n                Xenon-124\n              <\/div>\n\n            <\/a>\n\n\n            <div class=\"smt-iso-body\">\n\n              <div class=\"smt-iso-product-no\">\n                ISOTOPE GAS \u00b7 12\n              <\/div>\n\n              <h3>\n                Xenon-124\n              <\/h3>\n\n              <div class=\"smt-iso-cn-name\">\n                \u6c19-124\n              <\/div>\n\n\n              <div class=\"smt-iso-spec-grid\">\n\n                <div>\n                  <small>Parent Gas<\/small>\n                  <strong>Xenon<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Isotope<\/small>\n                  <strong>\u00b9\u00b2\u2074Xe<\/strong>\n                <\/div>\n\n                <div>\n                  <small>Abundance<\/small>\n                  <strong>99.9 atom%<\/strong>\n                <\/div>\n\n              <\/div>\n\n\n              <a href=\"\/xenon-124\/\" class=\"smt-iso-more\">\n\n                <span>View Details<\/span>\n                <b>\u2192<\/b>\n\n              <\/a>\n\n            <\/div>\n\n          <\/article>\n\n\n        <\/div>\n\n\n\n        <!-- =================================================\n             PAGINATION\n        ================================================== -->\n\n        <div class=\"smt-iso-pagination\">\n\n          <button class=\"smt-iso-prev\" type=\"button\" aria-label=\"Previous Page\">\n            \u2039\n          <\/button>\n\n          <button class=\"smt-iso-page-btn active\" data-page=\"1\" type=\"button\">\n            1\n          <\/button>\n\n          <button class=\"smt-iso-page-btn\" data-page=\"2\" type=\"button\">\n            2\n          <\/button>\n\n          <button class=\"smt-iso-next\" type=\"button\" aria-label=\"Next Page\">\n            \u203a\n          <\/button>\n\n        <\/div>\n\n\n      <\/main>\n\n    <\/div>\n\n  <\/div>\n\n<\/section>\n\n\n\n<style>\n\/* =========================================================\n   RESET\n========================================================= *\/\n\n.smt-iso-page,\n.smt-iso-page *{\n  box-sizing:border-box;\n}\n\n.smt-iso-page{\n  width:100vw;\n  margin-left:calc(50% - 50vw);\n  background:#ffffff;\n  overflow:hidden;\n\n  font-family:\n    Arial,\n    \"Microsoft YaHei\",\n    \"PingFang SC\",\n    Helvetica,\n    sans-serif;\n}\n\n\n\n\/* =========================================================\n   HERO\n========================================================= *\/\n\n.smt-iso-hero{\n  position:relative;\n\n  min-height:300px;\n\n  display:flex;\n  align-items:center;\n\n  overflow:hidden;\n\n  background:#061c2d;\n}\n\n.smt-iso-hero-bg{\n  position:absolute;\n  inset:0;\n\n  background:\n    radial-gradient(\n      circle at 76% 48%,\n      rgba(34,206,245,.36),\n      transparent 20%\n    ),\n    radial-gradient(\n      circle at 88% 25%,\n      rgba(64,119,220,.28),\n      transparent 22%\n    ),\n    linear-gradient(\n      112deg,\n      #061a29 0%,\n      #073750 55%,\n      #087da9 100%\n    );\n}\n\n.smt-iso-hero-bg:before{\n  content:\"\";\n\n  position:absolute;\n\n  right:7%;\n  top:-210px;\n\n  width:480px;\n  height:480px;\n\n  border:\n    1px solid rgba(117,221,250,.22);\n\n  border-radius:50%;\n\n  transform:rotate(42deg);\n}\n\n.smt-iso-hero-bg:after{\n  content:\"\";\n\n  position:absolute;\n\n  right:20%;\n  bottom:-260px;\n\n  width:420px;\n  height:420px;\n\n  border:\n    1px solid rgba(117,221,250,.14);\n\n  border-radius:50%;\n}\n\n.smt-iso-hero-overlay{\n  position:absolute;\n  inset:0;\n\n  background:\n    linear-gradient(\n      90deg,\n      rgba(4,24,37,.75),\n      rgba(4,24,37,.06)\n    );\n}\n\n.smt-iso-hero-inner{\n  position:relative;\n  z-index:3;\n\n  width:min(100% - 60px,1400px);\n\n  margin:0 auto;\n}\n\n.smt-iso-hero-kicker{\n  margin-bottom:15px;\n\n  color:#4ec8ef;\n\n  font-size:12px;\n\n  font-weight:700;\n\n  letter-spacing:3px;\n}\n\n.smt-iso-hero h1{\n  margin:0;\n\n  color:#ffffff;\n\n  font-size:60px;\n\n  line-height:1;\n\n  font-weight:700;\n\n  letter-spacing:-2px;\n}\n\n.smt-iso-hero p{\n  max-width:670px;\n\n  margin:20px 0 0;\n\n  color:rgba(255,255,255,.75);\n\n  font-size:16px;\n\n  line-height:1.8;\n}\n\n\n\n\/* =========================================================\n   MAIN\n========================================================= *\/\n\n.smt-iso-main{\n  padding:60px 0 100px;\n}\n\n.smt-iso-container{\n  width:min(100% - 60px,1400px);\n\n  margin:0 auto;\n\n  display:grid;\n\n  grid-template-columns:\n    285px minmax(0,1fr);\n\n  gap:46px;\n\n  align-items:start;\n}\n\n\n\n\/* =========================================================\n   SIDEBAR HEADER\n========================================================= *\/\n\n.smt-iso-side-head{\n  position:relative;\n\n  min-height:165px;\n\n  padding:34px 27px;\n\n  overflow:hidden;\n\n  background:\n    linear-gradient(\n      135deg,\n      #073958,\n      #07638e\n    );\n\n  color:#ffffff;\n}\n\n.smt-iso-side-head:after{\n  content:\"\";\n\n  position:absolute;\n\n  right:-65px;\n  bottom:-55px;\n\n  width:190px;\n  height:110px;\n\n  background:#08a9d7;\n\n  transform:rotate(-13deg);\n}\n\n.smt-iso-side-head small{\n  position:relative;\n  z-index:2;\n\n  display:block;\n\n  margin-bottom:11px;\n\n  color:#5bd0f5;\n\n  font-size:11px;\n\n  font-weight:700;\n\n  letter-spacing:2px;\n}\n\n.smt-iso-side-head strong{\n  position:relative;\n  z-index:2;\n\n  display:block;\n\n  font-size:29px;\n\n  line-height:1.25;\n}\n\n.smt-iso-side-head i{\n  position:relative;\n  z-index:2;\n\n  display:block;\n\n  width:46px;\n  height:2px;\n\n  margin-top:22px;\n\n  background:#ffffff;\n}\n\n\n\n\/* =========================================================\n   SIDEBAR NAV\n========================================================= *\/\n\n.smt-iso-side-nav{\n  margin-top:10px;\n}\n\n.smt-iso-side-nav a{\n  min-height:62px;\n\n  margin-bottom:8px;\n\n  padding:0 18px;\n\n  display:flex;\n\n  align-items:center;\n\n  justify-content:space-between;\n\n  gap:12px;\n\n  border:1px solid #e0e6e9;\n\n  background:#f6f7f8;\n\n  color:#426173 !important;\n\n  text-decoration:none !important;\n\n  font-size:14px;\n\n  transition:.25s ease;\n}\n\n.smt-iso-side-nav a b{\n  color:#a1afb6;\n\n  font-size:15px;\n\n  font-weight:400;\n}\n\n.smt-iso-side-nav a:hover{\n  padding-left:23px;\n\n  border-color:#b9dce9;\n\n  background:#f1f9fc;\n\n  color:#087eaa !important;\n}\n\n.smt-iso-side-nav a.active{\n  border-color:#07699e;\n\n  background:#07699e;\n\n  color:#ffffff !important;\n}\n\n.smt-iso-side-nav a.active b{\n  color:#ffffff;\n}\n\n\n\n\/* =========================================================\n   RIGHT\n========================================================= *\/\n\n.smt-iso-content{\n  min-width:0;\n}\n\n\n\n\/* =========================================================\n   BREADCRUMB\n========================================================= *\/\n\n.smt-iso-breadcrumb{\n  min-height:64px;\n\n  padding:0 25px;\n\n  display:flex;\n\n  align-items:center;\n\n  gap:11px;\n\n  background:\n    linear-gradient(\n      90deg,\n      #079ccf,\n      #087fb6\n    );\n\n  color:#ffffff;\n\n  font-size:14px;\n}\n\n.smt-iso-breadcrumb a{\n  color:rgba(255,255,255,.88) !important;\n\n  text-decoration:none !important;\n}\n\n.smt-iso-breadcrumb strong{\n  color:#ffffff;\n\n  font-weight:600;\n}\n\n\n\n\/* =========================================================\n   INTRO\n========================================================= *\/\n\n.smt-iso-intro{\n  padding:52px 0 42px;\n\n  display:grid;\n\n  grid-template-columns:1fr 1fr;\n\n  gap:60px;\n\n  align-items:end;\n}\n\n.smt-iso-intro-title small{\n  display:block;\n\n  margin-bottom:11px;\n\n  color:#079bcf;\n\n  font-size:11px;\n\n  font-weight:700;\n\n  letter-spacing:2.2px;\n}\n\n.smt-iso-intro-title h2{\n  margin:0;\n\n  color:#15384d;\n\n  font-size:43px;\n\n  line-height:1.08;\n\n  font-weight:700;\n\n  letter-spacing:-1px;\n}\n\n.smt-iso-intro-title h2 span{\n  display:block;\n\n  margin-top:4px;\n\n  color:#87939a;\n\n  font-weight:300;\n}\n\n.smt-iso-intro-copy p{\n  max-width:520px;\n\n  margin:0;\n\n  color:#75838c;\n\n  font-size:15px;\n\n  line-height:1.8;\n}\n\n\n\n\/* =========================================================\n   PRODUCT GRID\n========================================================= *\/\n\n.smt-iso-grid{\n  display:grid;\n\n  grid-template-columns:\n    repeat(3,minmax(0,1fr));\n\n  gap:28px;\n}\n\n\n\n\/* =========================================================\n   CARD\n========================================================= *\/\n\n.smt-iso-card{\n  min-width:0;\n\n  border:1px solid #dde5e8;\n\n  background:#ffffff;\n\n  overflow:hidden;\n\n  transition:\n    transform .3s ease,\n    box-shadow .3s ease,\n    border-color .3s ease;\n}\n\n.smt-iso-card:hover{\n  transform:translateY(-5px);\n\n  border-color:#acd8e8;\n\n  box-shadow:\n    0 16px 34px\n    rgba(16,51,71,.09);\n}\n\n\n\n\/* =========================================================\n   VISUAL\n========================================================= *\/\n\n.smt-iso-visual{\n  position:relative;\n\n  height:240px;\n\n  display:flex;\n\n  align-items:center;\n  justify-content:center;\n\n  flex-direction:column;\n\n  overflow:hidden;\n\n  background:\n    radial-gradient(\n      circle at 72% 20%,\n      rgba(124,229,255,.32),\n      transparent 30%\n    ),\n    linear-gradient(\n      140deg,\n      #2daceb 0%,\n      #0789c7 53%,\n      #065d98 100%\n    );\n\n  text-decoration:none !important;\n}\n\n.smt-iso-visual:before{\n  content:\"\";\n\n  position:absolute;\n\n  width:190px;\n  height:190px;\n\n  border-radius:50%;\n\n  background:\n    radial-gradient(\n      circle,\n      rgba(255,255,255,.15),\n      transparent 68%\n    );\n}\n\n\n\n\/* =========================================================\n   FORMULA\n========================================================= *\/\n\n.smt-iso-formula{\n  position:relative;\n\n  z-index:5;\n\n  min-width:110px;\n\n  padding:10px 18px;\n\n  border:\n    1px solid rgba(255,255,255,.22);\n\n  background:\n    rgba(255,255,255,.12);\n\n  color:#ffffff;\n\n  text-align:center;\n\n  font-size:44px;\n\n  line-height:1;\n\n  font-weight:700;\n}\n\n.smt-iso-formula sup{\n  position:relative;\n\n  top:-.25em;\n\n  margin-right:2px;\n\n  font-size:21px;\n}\n\n.smt-iso-formula sub{\n  font-size:20px;\n}\n\n.smt-iso-formula-long{\n  font-size:34px;\n}\n\n\n\n\/* VISUAL NAME *\/\n\n.smt-iso-visual-name{\n  position:relative;\n\n  z-index:5;\n\n  margin-top:17px;\n\n  color:rgba(255,255,255,.86);\n\n  font-size:13px;\n\n  line-height:1.3;\n\n  text-align:center;\n}\n\n\n\n\/* =========================================================\n   ORBITS\n========================================================= *\/\n\n.smt-iso-orbit{\n  position:absolute;\n\n  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font-weight:700;\n\n  letter-spacing:1.7px;\n}\n\n.smt-iso-body h3{\n  min-height:auto;\n\n  margin:0 0 7px;\n\n  color:#16384c;\n\n  font-size:21px;\n\n  line-height:1.35;\n\n  font-weight:600;\n}\n\n\n\n\/* =========================================================\n   CHINESE NAME\n========================================================= *\/\n\n.smt-iso-cn-name{\n  min-height:27px;\n\n  margin:0 0 18px;\n\n  color:#687d89;\n\n  font-size:15px;\n\n  line-height:1.5;\n\n  font-weight:500;\n\n  letter-spacing:.5px;\n}\n\n\n\n\/* =========================================================\n   SPECS\n========================================================= *\/\n\n.smt-iso-spec-grid{\n  display:grid;\n\n  grid-template-columns:\n    repeat(3,minmax(0,1fr));\n\n  margin-bottom:21px;\n\n  border-top:\n    1px solid #e5ebee;\n\n  border-bottom:\n    1px solid #e5ebee;\n}\n\n.smt-iso-spec-grid &gt; div{\n  min-width:0;\n\n  padding:\n    15px 9px 14px 0;\n}\n\n.smt-iso-spec-grid &gt; div + 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!important;\n\n  color:#0796ca !important;\n}\n\n.smt-iso-pagination\n.smt-iso-page-btn.active{\n  border-color:#073653 !important;\n\n  background:#073653 !important;\n\n  color:#ffffff !important;\n}\n\n\n\n\/* =========================================================\n   TABLET\n========================================================= *\/\n\n@media(max-width:1150px){\n\n  .smt-iso-container{\n    grid-template-columns:\n      250px minmax(0,1fr);\n\n    gap:30px;\n  }\n\n  .smt-iso-grid{\n    grid-template-columns:\n      repeat(2,minmax(0,1fr));\n  }\n\n}\n\n\n\n\/* =========================================================\n   MOBILE\n========================================================= *\/\n\n@media(max-width:767px){\n\n  .smt-iso-hero{\n    min-height:245px;\n  }\n\n  .smt-iso-hero-inner{\n    width:min(100% - 30px,1400px);\n  }\n\n  .smt-iso-hero h1{\n    font-size:42px;\n  }\n\n  .smt-iso-main{\n    padding:35px 0 65px;\n  }\n\n  .smt-iso-container{\n    width:min(100% - 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MOBILE\n   \u624b\u673a\u4e00\u884c 1 \u4e2a\n========================================================= *\/\n\n@media(max-width:767px){\n\n  .smt-iso-page .smt-iso-grid{\n    grid-template-columns:\n      1fr !important;\n\n    gap:20px !important;\n  }\n\n}\n\n<\/style>\n\n<style>\n\/* =========================================================\n   ISOTOPE GAS - HEADER SMALL GAP FINAL\n   \u76ee\u6807\uff1aHeader \u4e0e Hero \u4e4b\u95f4\u56fa\u5b9a\u4fdd\u7559\u7ea6 8px \u767d\u8272\u5c0f\u95f4\u9699\n   \u4e0d\u4fee\u6539 Header \u672c\u8eab\uff0c\u4e0d\u5f71\u54cd\u5176\u4ed6\u9875\u9762\n========================================================= *\/\n\n\/*\n   \u5148\u7528\u8d1f margin \u62b5\u6d88 WordPress \/ \u4e3b\u9898\u539f\u672c\u8f83\u5927\u7684\u9876\u90e8\u7559\u767d\uff0c\n   \u518d\u7528 page \u81ea\u8eab\u7684 8px \u767d\u8272 padding \u91cd\u65b0\u5efa\u7acb\u4e00\u4e2a\u7a33\u5b9a\u7684\u5c0f\u95f4\u9699\u3002\n   \u8fd9\u6837\u4e0d\u4f1a\u56e0\u4e3a\u4e3b\u9898\u5916\u5c42\u95f4\u8ddd\u53d8\u5316\u800c\u518d\u6b21\u53d8\u6210\u201c\u5b8c\u5168\u8d34\u4f4f\u201d\u3002\n*\/\n.smt-iso-page{\n  margin-top:-28px !important;\n  padding-top:8px !important;\n  background:#ffffff !important;\n}\n\n\/* WordPress \/ Gutenberg \u5916\u5c42\u60c5\u51b5\u4e0b\u540c\u6837\u5f3a\u5236\u4fdd\u7559 8px *\/\n.wp-block-html &gt; 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