{"id":7281,"date":"2020-04-28T12:52:14","date_gmt":"2020-04-28T19:52:14","guid":{"rendered":"https:\/\/www.vernier.com\/til\/?p=7281&#038;preview=true&#038;preview_id=7281"},"modified":"2025-08-08T14:32:15","modified_gmt":"2025-08-08T21:32:15","slug":"go-direct-mini-gc-troubleshooting-and-faqs-2","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/7281","title":{"rendered":"Go Direct Mini GC Troubleshooting and FAQs"},"content":{"rendered":"<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\"><a href=\"\/product\/go-direct-mini-gc\/\">Go Direct<sup>&reg;<\/sup> Mini GC<sup>&trade;<\/sup><\/a> (<nobr>GDX-GC<\/nobr>)<\/h3>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.vernier.com\/manuals\/gdx-gc\">Specifications and User Guide<\/a><\/p>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.vernier.com\/wp-content\/uploads\/2019\/12\/product.gdx-gc.hero_.001-scaled.jpg\" alt=\"\"\/><\/figure>\n<\/div>\n<\/div>\n<ul class=\"wp-block-list has-very-light-gray-background-color has-background\">\n<li>If you have the Mini GC Plus, see <a href=\"\/til\/2841\/\">Mini GC Plus Gas Chromatograph Troubleshooting and FAQs<\/a><\/li>\n<li>If you have the original Mini GC, see <a href=\"\/til\/2180\/\">Mini Gas Chromatograph Troubleshooting and FAQs<\/a><\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\">\n<div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Gas Chromatography with the Go Direct\u00ae Mini GC\u2122\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/MCi43ZRfelA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div>\n<\/figure>\n<p class=\"wp-block-paragraph\">\n<p class=\"wp-block-paragraph\">\n<h3 class=\"wp-block-heading\">Troubleshooting<\/h3>\n<p class=\"wp-block-paragraph\"><strong>General: <\/strong>Press the power button on the sensor to turn it on. Connect your sensor as described in the <a href=\"https:\/\/www.vernier.com\/til\/get-started\/chemistry-instruments\">Getting Started instructions for your device<\/a>.<\/p>\n<h4 class=\"wp-block-heading\"><strong>COMMON ISSUES<\/strong><\/h4>\n<ul class=\"wp-block-list\">\n<li><strong>Inconsistent Flow<\/strong><br \/>\u26ac Likely Cause: Worn or damaged septum.<br \/>\u26ac Solution: Replace the septum.<\/li>\n<li><strong>Inconsistent Peak Areas<\/strong><br \/>\u26ac Likely Cause: Irregular injection volume or worn septum.<br \/>\u26ac Solution: Check your injection technique and replace the septum.<\/li>\n<li><strong>No Communication<\/strong><br \/>\u26ac Likely Cause: Software mismatch or cable\/Bluetooth connection.<br \/>\u26ac Solution: Be sure you&#8217;re using Instrumental Analysis software. Check USB cables or verify Bluetooth pairing.<\/li>\n<li><strong>No Power<\/strong><br \/>\u26ac Likely Cause: Power cord or switch issue.<br \/>\u26ac Solution: Confirm that power plugs are fully inserted and the switch is turned on.<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">General Use Tips<\/h3>\n<ul class=\"wp-block-list\">\n<li><strong>Use Approved Compounds Only<\/strong>: Always refer to the list of acceptable compounds in <a href=\"https:\/\/www.vernier.com\/manuals\/gdx-gc\">the user guide<\/a> before injecting new samples.<\/li>\n<li><strong>Avoid High-Water Samples<\/strong>: Do not inject samples that contain more than 5% water. Water can damage the detector.<\/li>\n<li><strong>Hamilton Syringe Note<\/strong>: The syringe shipped with the device has a brown bumper on the needle. <strong>Do not remove this bumper<\/strong>\u2014it protects the injection port.<\/li>\n<\/ul>\n<p class=\"has-text-align-center has-very-light-gray-background-color has-background wp-block-paragraph\">Also see <a href=\"\/til\/2953\/\">Best Practice Techniques for Vernier gas chromatographs<\/a><\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Top Questions<\/h3>\n<style>.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-inner-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:8px;}.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-panel-inner{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;padding-top:10px;padding-right:10px;padding-bottom:10px;padding-left:10px;}.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:1px solid #cdcdc9;border-right:1px solid #cdcdc9;border-bottom:1px solid #cdcdc9;border-left:1px solid #cdcdc9;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background:#cce8ea;font-size:18px;line-height:24px;color:#007377;padding-top:10px;padding-right:14px;padding-bottom:10px;padding-left:14px;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap .kt-blocks-accordion-icon-trigger:before{background:#007377;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger{background:#007377;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-icon-trigger:before{background:#cce8ea;}.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6 .kt-blocks-accordion-header:focus-visible{color:#007377;background:#e6e6e4;border-top:1px solid #66bac0;border-right:1px solid #66bac0;border-bottom:1px solid #66bac0;border-left:1px solid #66bac0;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion--visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle ) .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#007377;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger, body:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger{background:#007377;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:hover .kt-blocks-accordion-icon-trigger:before, body:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:after, body:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible .kt-blocks-accordion-icon-trigger:before{background:#e6e6e4;}.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{color:#f79b2e;background:#444444;border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basiccircle ):not( .kt-accodion-icon-style-xclosecircle ):not( .kt-accodion-icon-style-arrowcircle )  > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:#f79b2e;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger{background:#f79b2e;}.kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:after, .kt-accordion-id7281_ddfdd6-4e6:not( .kt-accodion-icon-style-basic ):not( .kt-accodion-icon-style-xclose ):not( .kt-accodion-icon-style-arrow ) .kt-blocks-accordion-header.kt-accordion-panel-active .kt-blocks-accordion-icon-trigger:before{background:#444444;}@media all and (max-width: 1024px){.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-panel-inner{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}}@media all and (max-width: 1024px){.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:1px solid #cdcdc9;border-right:1px solid #cdcdc9;border-bottom:1px solid #cdcdc9;border-left:1px solid #cdcdc9;}}@media all and (max-width: 1024px){.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6 .kt-blocks-accordion-header:focus-visible{border-top:1px solid #66bac0;border-right:1px solid #66bac0;border-bottom:1px solid #66bac0;border-left:1px solid #66bac0;}}@media all and (max-width: 1024px){.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}}@media all and (max-width: 767px){.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-inner-wrap{display:block;}.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-inner-wrap .kt-accordion-pane:not(:first-child){margin-top:8px;}.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-panel-inner{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header{border-top:1px solid #cdcdc9;border-right:1px solid #cdcdc9;border-bottom:1px solid #cdcdc9;border-left:1px solid #cdcdc9;}.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header:hover, \n\t\t\t\tbody:not(.hide-focus-outline) .kt-accordion-id7281_ddfdd6-4e6 .kt-blocks-accordion-header:focus-visible{border-top:1px solid #66bac0;border-right:1px solid #66bac0;border-bottom:1px solid #66bac0;border-left:1px solid #66bac0;}.kt-accordion-id7281_ddfdd6-4e6 .kt-accordion-header-wrap .kt-blocks-accordion-header:focus-visible,\n\t\t\t\t.kt-accordion-id7281_ddfdd6-4e6 > .kt-accordion-inner-wrap > .wp-block-kadence-pane > .kt-accordion-header-wrap > .kt-blocks-accordion-header.kt-accordion-panel-active{border-top:1px solid #f79b2e;border-right:1px solid #f79b2e;border-bottom:1px solid #f79b2e;border-left:1px solid #f79b2e;}}<\/style>\n<div class=\"wp-block-kadence-accordion alignnone\">\n<div class=\"kt-accordion-wrap kt-accordion-id7281_ddfdd6-4e6 kt-accordion-has-13-panes kt-active-pane-0 kt-accordion-block kt-pane-header-alignment-left kt-accodion-icon-style-xclose kt-accodion-icon-side-right\" style=\"max-width:none\">\n<div class=\"kt-accordion-inner-wrap\" data-allow-multiple-open=\"false\" data-start-open=\"none\">\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-3 kt-pane7281_e06964-0d9\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>1. What detector does the Go Direct Mini GC use?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">The Go Direct Mini GC uses a <strong>chemiresistive carbon nanotube (CNT) detector<\/strong>. This is different from the MEMS (thermal conductivity) detectors used in older models. The CNT detector offers high sensitivity to both polar and nonpolar organic compounds.<\/p>\n<p class=\"wp-block-paragraph\">See also <a href=\"\/til\/7313\/\">How is the Go Direct Mini GC different than previous versions of the Mini GC?<\/a>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-4 kt-pane7281_467e4d-a810\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>2. Why is the y-axis labeled \u201cNormalized Response\u201d instead of mV?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">Because the CNT detector measures resistance change rather than voltage output, the signal is displayed as <strong>\u201cNormalized Response\u201d<\/strong>, not millivolts. This allows for comparison of peak shapes and retention times, but it is not intended for quantifying absolute concentration values without calibration.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-5 kt-pane7281_4070e7-0a11\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>3. Can I display the signal in millivolts?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">No. The output from the CNT detector does not translate directly to millivolts, so the system does not support mV display like the older Mini GC Plus.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-6 kt-pane7281_6e74c6-3112\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>4. I\u2019m seeing some baseline drift\u2014what should I do?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">Baseline drift is expected with chemiresistive detectors, but here are some tips to manage it:<\/p>\n<ul class=\"wp-block-list\">\n<li><strong>Pay attention to the Y-Axis scale<\/strong>: If your sample has a low signal, even small baseline drift will appear more significant. Try increasing the injection volume or adjusting your temperature and pressure settings to improve peak size.<\/li>\n<li><strong>Use an isothermal temperature profile<\/strong>: If you&#8217;re analyzing a single compound, there&#8217;s no need for a temperature ramp. A constant temperature minimizes drift. Only use a ramp when separating complex mixtures.<\/li>\n<li><strong>Subtract the baseline<\/strong>: If your signal contains consistent electronic noise or drift, using the baseline subtraction feature in the software can improve the clarity and accuracy of your chromatogram.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-7 kt-pane7281_151a62-a313\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>5. How can I improve peak shapes?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<ul class=\"wp-block-list\">\n<li>Review the <strong>temperature and pressure settings<\/strong>. These may need to be optimized for the Go Direct unit (they differ from Mini GC Plus settings).<\/li>\n<li>Start with our <strong>published experiments and example profiles<\/strong> in the <a href=\"\/til\/7788\/\">Go Direct Mini GC Compound Library<\/a><\/li>\n<li>Use <strong>injection volumes between 0.1\u20130.3 \u03bcL<\/strong> and ensure consistent injection technique.<\/li>\n<li>Replace the <strong>septum<\/strong> regularly if you&#8217;re seeing split peaks or tailing.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-8 kt-pane7281_6b8dd4-0f14\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>6. What\u2019s the best way to inject a gas or volatile sample?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">All samples\u2014liquid or gas\u2014must be injected using a <strong>syringe through the septum<\/strong>. For more information, see <a href=\"\/til\/2104\/\">Can I inject a gas into the Vernier gas chromatographs?<\/a>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-9 kt-pane7281_c7cb88-5e15\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>7. How do I maintain the unit?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<ul class=\"wp-block-list\">\n<li><strong>Septum<\/strong>: Replace regularly (every ~40\u201350 injections).<\/li>\n<li><strong>Column<\/strong>: Run a high-temp clean cycle with a volatile like acetone to remove residue.<\/li>\n<li><strong>Power<\/strong>: Use a <strong>short USB cable<\/strong> or a <strong>powered USB hub<\/strong> if you&#8217;re experiencing communication issues.<\/li>\n<\/ul>\n<p class=\"wp-block-paragraph\"><strong>Note: <\/strong>For column and\/or sensor replacement, email <a href=\"mailto:chemistry@vernier.com\">chemistry@vernier.com<\/a> for assistance.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-10 kt-pane7281_e9c652-5b16\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>8. What software do I use?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">The Go Direct Mini GC uses <strong><a href=\"https:\/\/www.vernier.com\/ia\">Instrumental Analysis<\/a><\/strong>, our free software compatible with Windows, macOS, iOS, iPadOS, Android, and Chrome. The sensor can also be used with the LabQuest App (LabQuest 2 or LabQuest 3 only). It is not supported in Logger <em>Pro<\/em>.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-11 kt-pane7281_1a8b5f-0f17\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>9. Can I use Logger <em>Pro<\/em> with the Go Direct Mini GC?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">No. Logger <em>Pro<\/em> is not compatible with the Go Direct Mini GC. Use <a href=\"https:\/\/www.vernier.com\/product\/instrumental-analysis\/\">Instrumental Analysis<\/a>, LabQuest 2, or LabQuest 3 instead.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-12 kt-pane7281_ea4cd0-5018\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>10. My Mini GC is not reaching the set pressure.<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">This could indicate a <strong>clogged column<\/strong> or <strong>septum leak<\/strong>. Try:<\/p>\n<ul class=\"wp-block-list\">\n<li>Replacing the <strong>septum<\/strong>.<\/li>\n<li>Running a <strong>cleaning cycle with acetone<\/strong> at high temperature.<\/li>\n<li>Checking the <strong>power connection<\/strong> and <strong>USB cable<\/strong>.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-13 kt-pane7281_8c9ff0-b419\">\n<div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\" type=\"button\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\"><strong>11. Can students use Go Direct Mini GC alongside older Mini GC Plus units?<\/strong><\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div>\n<div class=\"kt-accordion-panel kt-accordion-panel-hidden\">\n<div class=\"kt-accordion-panel-inner\">\n<p class=\"wp-block-paragraph\">Yes, but the <strong>column and detector are different<\/strong>, so this may cause confusion. Review our guide:<br \/><a href=\"\/til\/7313\/\">How is the Go Direct Mini GC different than previous versions of the Mini GC?<\/a>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Additional Troubleshooting<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/til\/7313\/\">How is the Go Direct Mini GC different than previous versions of the Mini GC?<\/a><\/li>\n<li><a href=\"\/til\/7788\/\">Go Direct Mini GC Compound Library<\/a><\/li>\n<li><a href=\"\/til\/2953\/\">Best Practice Techniques for Vernier gas chromatographs<\/a><\/li>\n<li><a href=\"\/til\/2900\/\">Can I inject water into Vernier gas chromatographs?<\/a><\/li>\n<li><a href=\"\/til\/2104\/\">Can I inject a gas into the Vernier gas chromatographs?<\/a><\/li>\n<li><a href=\"\/til\/2050\/\">What size needle do Vernier gas chromatographs require?<\/a><\/li>\n<li><a href=\"\/til\/2296\/\">Where can I order the syringe for Vernier gas chromatographs?<\/a><\/li>\n<li><a href=\"\/til\/2548\/\">The peak heights on my Vernier gas chromatograph are lower than they were previously.<\/a><\/li>\n<li><a href=\"\/til\/2547\/\">My Vernier gas chromatograph pressure won't get above 15 kPa.<\/a><\/li>\n<li><a href=\"\/til\/3154\/\">I need to ship a Vernier gas chromatograph to Vernier for repair. How should I package it?<\/a><\/li>\n<li><a href=\"\/til\/3916\/\">Can I purchase a replacement power supply for my Vernier gas chromatograph?<\/a><\/li>\n<li><a href=\"\/til\/14785\/\">My Go Direct Mini GC displays \"Error 2\"<\/a><\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Specifications<\/h3>\n<ul class=\"wp-block-list\">\n<li>Column: Restek MXT-502.2 Column<br \/>\u26ac Siltek-treated stainless steel with proprietary diphenyl\/dimethyl polysiloxane phase<\/li>\n<li>Column operating temperature: 30\u00b0C to 160\u00b0C<br \/>\u26ac maximum heating ramp: 10\u00b0C\/min<\/li>\n<li>Detector: Seacoast Science carbon-nanotube chemiresistive detector<\/li>\n<li>Carrier gas: Ambient air<\/li>\n<li>Operating pressure: 1 to 21 kPa (above ambient pressure)<\/li>\n<li>Environmental conditions<br \/>\u26ac Temperature: 5\u00b0C to 40\u00b0C <br \/>\u26ac Humidity: 95% or less (non-condensing environment)<\/li>\n<li>Liquid injection volume: 0.01 to 0.6 \u00b5L<\/li>\n<li>Dimensions: 108 mm height, 191 mm length, 133 mm width<br \/>\u26ac Weight: 1.3 kg<\/li>\n<li>Power Requirements: 24 VDC, 2.5 A from an external power supply<\/li>\n<li>Utility: External power supply rated for 100\u2013240 VAC, 1.5 A 50\u201360 Hz<\/li>\n<li>Connections:<br \/>\u26ac Wireless: Bluetooth<sup>\u00ae<\/sup> v4.2 (wireless range 30 m unobstructed)<br \/>\u26ac Wired: USB 2.0 full speed<\/li>\n<\/ul>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Related Products<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/mini-usb-to-usb-c-cable\/\">Mini USB-C Cable<\/a> (<nobr>CB-USB-C-MINI<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Replacement Parts<\/h3>\n<ul class=\"wp-block-list\">\n<li><a href=\"\/product\/gc-septa-package-of-4\/\">GC Septa (package of 4)<\/a> (<nobr>GC-SEP<\/nobr>)<\/li>\n<li><a href=\"\/product\/gc-1%ce%bcl-hamilton-syringe\/\">Mini GC 1 \u03bcL Hamilton Syringe<\/a> (<nobr>GC-SYR-MIC<\/nobr>)<\/li>\n<li><a href=\"\/product\/mini-usb-cable\/\">Mini USB Cable<\/a> (<nobr>CB-USB-MINI<\/nobr>)<\/li>\n<li><a href=\"\/product\/replacement-power-supply-for-vernier-mini-gas-chromatographs\/\">Replacement Power Supply for Vernier Mini Gas Chromatographs<\/a> (<nobr>GC2-MINI-PS<\/nobr>)<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<p class=\"has-very-light-gray-background-color has-background wp-block-paragraph\">For column and\/or sensor replacement, email <a href=\"mailto:chemistry@vernier.com\">chemistry@vernier.com<\/a> for assistance.<\/p>","protected":false},"excerpt":{"rendered":"<p>Specifications and User Guide Troubleshooting General: Press the power button on the sensor to turn it on. Connect your sensor as described in the Getting&#8230;<\/p>\n","protected":false},"author":11015,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[7521,4755,3574,7539,7498,6519,720,3573],"class_list":["post-7281","post","type-post","status-publish","format-standard","hentry","tag-gc3main","tag-gcmain","tag-gcminimain","tag-gdx-gc","tag-gdxgcmain","tag-gdxmain","tag-maintil","tag-minigcmain"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/7281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/11015"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=7281"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/7281\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=7281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=7281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=7281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}