{"id":9109,"date":"2020-11-26T16:19:41","date_gmt":"2020-11-26T16:19:41","guid":{"rendered":"https:\/\/fei-online.com\/?p=9109"},"modified":"2020-11-26T16:19:41","modified_gmt":"2020-11-26T16:19:41","slug":"quantitative-analysis-of-food-packaging-by-thermal-desorption-gc-ms-method","status":"publish","type":"post","link":"https:\/\/fei-online.com\/quantitative-analysis-of-food-packaging-by-thermal-desorption-gc-ms-method\/","title":{"rendered":"Quantitative analysis of food packaging by Thermal Desorption\u2013GC\u2013MS method"},"content":{"rendered":"<div id='av_section_1'  class='avia-section main_color avia-section-default avia-no-border-styling  avia-bg-style-scroll  avia-builder-el-0  avia-builder-el-no-sibling   container_wrap fullsize' style=' '  ><div class='container' ><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-full alpha units'><div class='post-entry post-entry-type-page post-entry-9109'><div class='entry-content-wrapper clearfix'>\n<div class=\"flex_column av_one_fifth  flex_column_div av-zero-column-padding first  avia-builder-el-1  el_before_av_three_fifth  avia-builder-el-first  \" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><p style=\"text-align: center;\"><div id=\"ads-slider-28\" class=\"custom-slider ads-slider-1124320981 ads-slider\"><ul><li><!--Begin ClixTrac.com Banner Code -->\r\n<a href=\"https:\/\/clixtrac.com\/goto\/?308404\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/clixtrac.com\/banner\/308404.jpg\" alt=\"Free from food\" title=\"Free from food\" border=\"0\" \/><\/a>\r\n<!--End ClixTrac.com Banner Code --><\/li><li><!--Begin ClixTrac.com Banner Code -->\r\n<a href=\"https:\/\/clixtrac.com\/banner\/click.php?banner=302805\" target=\"_blank\" rel=\"noopener\">\r\n<img decoding=\"async\" src=\"https:\/\/clixtrac.com\/banner\/302805.jpg\" alt=\"LUBRIPLATE\" title=\"LUBRIPLATE\" border=\"0\" width=\"120\" height=\"600\" \/><\/a>\r\n<!--End ClixTrac.com Banner Code --><\/li><li><div style=\"margin-left: auto; margin-right: auto; text-align: center; \" id=\"ads-2026155874\"><!--Begin ClixTrac.com Banner Code -->\r\n<a href=\"https:\/\/clixtrac.com\/banner\/click.php?banner=297426\" target=\"_blank\" rel=\"noopener\">\r\n<img decoding=\"async\" width=\"100%\" height=\"auto\" src=\"https:\/\/clixtrac.com\/banner\/297426.jpg\" alt=\"Click here for more information!\" title=\"Click here for more information!\" border=\"0\" \/><\/a>\r\n<!--End ClixTrac.com Banner Code --><\/div><\/li><\/ul><\/div><script>( window.advanced_ads_ready || jQuery( document ).ready ).call( null, function() {var $adsslider1124320981 = jQuery( \".ads-slider-1124320981\" );$adsslider1124320981.on( \"unslider.ready\", function() { jQuery( \"div.custom-slider ul li\" ).css( \"display\", \"block\" ); });$adsslider1124320981.unslider({ delay:5000, autoplay:true, nav:false, arrows:false, infinite:true });$adsslider1124320981.on(\"mouseover\", function(){$adsslider1124320981.unslider(\"stop\");}).on(\"mouseout\", function() {$adsslider1124320981.unslider(\"start\");});});<\/script><\/p>\n<\/div><\/section><\/div><div class=\"flex_column av_three_fifth  flex_column_div av-zero-column-padding   avia-builder-el-3  el_after_av_one_fifth  el_before_av_one_fifth  \" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><p style=\"text-align: center;\"><\/p>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><header class=\"entry-content-header\"><h1 class=\"post-title entry-title\" itemprop=\"headline\">Quantitative analysis of food packaging by Thermal Desorption\u2013GC\u2013MS method<\/h1><span class=\"post-meta-infos\">\/ <span class=\"blog-categories minor-meta\">in <a href=\"https:\/\/fei-online.com\/category\/featured-articles\/\" rel=\"tag\">Featured Articles<\/a> <\/span><\/span><\/header>\n<\/div><\/section><br \/>\n<section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>This application note demonstrates quantitative analysis of food packaging samples by thermally desorbing the sample into a GC-MS.<\/h4>\n<p><em>By Xiaohui Zhang<\/em><\/p>\n<p><!--more--><\/p>\n<h4>Introduction<\/h4>\n<p>Food packaging is used to protect food against microbiological, chemical and physical contamination. However, the interactions between the food packaging and the content may actually lead to alterations in the food quality. Two types of such interactions have been extensively studied as (1) migration of substances from packaging to food [1,2], where organic compounds, such as adhesive, ink solvent, plasticisers, photoinitiators, perfluorochemicals, leached from the container into the content, and (2) scalping by the packaging [3], where the flavour and antioxidant in the food are absorbed by the container.<\/p>\n<p>In this application note, various types of food packaging samples were tested against a list of volatile organic compounds (VOCs) that are either known as compounds that may migrate into food or flavour additives that were adsorbed by the packaging. The analysis was performed on a CDS 7550S thermal desorber that was connected to a GC-MS.<\/p>\n<h4>Experiment setup<\/h4>\n<p>Six food packaging samples were cut from two different brands of chocolate, one sandwich cookie, one instant noodle, one potato chips, and one energy bar. All samples had the same dimension as 1\u201d x 1\u201d. Each sample was individually weighed and folded into a \u201dOD x 3.5\u201d L empty quartz tube (Camsco, Houston, TX). Then each tube was loaded into the 7550S thermal desorber, purged at 35 \u00b0C with purging gas to remove air, and sequentially heated at 60 \u00b0C for 10 minutes to release VOCs, which were collected onto a 1\/8\u201d x 115 mm inert coated refocusing trap packed with Carbograph 1 60\/80 and Carbograph 5 60\/80. The trap was heated at 300 \u00b0C for 3 minutes to transfer all the analytes to a Shimadzu GC-MS QP-2010 for analysis.<\/p>\n<h4>Results and Discussions<\/h4>\n<p>Figure 1 (a-f) showed the total ion chromatogram of VOCs from six food packaging samples, which had dramatically different composition.<\/p>\n<p>These varieties of VOCs were grouped as migration of substances from packaging to food shown in Table 1, and scalping by the packaging summarized in Table 2. Table 1 was further categorized into three subgroups as adhesive, ink solvent and plasticizer. Table 2 was also sorted into subgroups as antioxidant, flavour, flavour solvent and surfactant.<\/p>\n<p>Among the detected compounds in Table 1, styrene, phthalates, Txib, diacetone alcohol and 1-(2-methoxypropoxy)-2-Propanol all have direct impact on human health and quantification is required as part of the food safety regulation.<\/p>\n<p>Figure 2 showed a 6-point calibration curve by spiking 1 ng, 2 ng, 5 ng, 10 ng, 25 ng and 50 ng styrene standards into a thermal desorption tube packed with Tenax and desorbed under the same condition by 7550S into GC-MS. Based on the calibration curve, the styrene in the sandwich cookie bag was quantified as 3.3 ppm.<\/p>\n<h4>Conclusions<\/h4>\n<p>Six food packaging samples were analyzed quantitatively by thermal desorption method on the VOC contents. The CDS 7550S thermal desorber was demonstrated as a useful tool in investigating the migration and scalping processes for the food industry.<\/p>\n<\/div><\/section><br \/>\n<div  class='av-social-sharing-box  avia-builder-el-7  el_after_av_textblock  avia-builder-el-last  av-social-sharing-box-minimal '><div class='av-share-box'><h5 class='av-share-link-description av-no-toc '>Share this<\/h5><ul class='av-share-box-list noLightbox'><li class='av-share-link av-social-link-facebook' ><a target=\"_blank\" aria-label=\"Share on Facebook\" href='https:\/\/www.facebook.com\/sharer.php?u=https:\/\/fei-online.com\/quantitative-analysis-of-food-packaging-by-thermal-desorption-gc-ms-method\/&#038;t=Quantitative%20analysis%20of%20food%20packaging%20by%20Thermal%20Desorption%E2%80%93GC%E2%80%93MS%20method' aria-hidden='false' data-av_icon='\ue8f3' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Facebook' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on Facebook<\/span><\/a><\/li><li class='av-share-link av-social-link-twitter' ><a target=\"_blank\" aria-label=\"Share on Twitter\" href='https:\/\/twitter.com\/share?text=Quantitative%20analysis%20of%20food%20packaging%20by%20Thermal%20Desorption%E2%80%93GC%E2%80%93MS%20method&#038;url=https:\/\/fei-online.com\/?p=9109' aria-hidden='false' data-av_icon='\ue8f1' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on Twitter' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on Twitter<\/span><\/a><\/li><li class='av-share-link av-social-link-whatsapp' ><a target=\"_blank\" aria-label=\"Share on WhatsApp\" href='https:\/\/api.whatsapp.com\/send?text=https:\/\/fei-online.com\/quantitative-analysis-of-food-packaging-by-thermal-desorption-gc-ms-method\/' aria-hidden='false' data-av_icon='\uf232' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on WhatsApp' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on WhatsApp<\/span><\/a><\/li><li class='av-share-link av-social-link-linkedin' ><a target=\"_blank\" aria-label=\"Share on LinkedIn\" href='https:\/\/linkedin.com\/shareArticle?mini=true&#038;title=Quantitative%20analysis%20of%20food%20packaging%20by%20Thermal%20Desorption%E2%80%93GC%E2%80%93MS%20method&#038;url=https:\/\/fei-online.com\/quantitative-analysis-of-food-packaging-by-thermal-desorption-gc-ms-method\/' aria-hidden='false' data-av_icon='\ue8fc' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share on LinkedIn' rel=\"noopener\"><span class='avia_hidden_link_text'>Share on LinkedIn<\/span><\/a><\/li><li class='av-share-link av-social-link-mail' ><a  aria-label=\"Share by Mail\" href='mailto:?subject=Quantitative%20analysis%20of%20food%20packaging%20by%20Thermal%20Desorption%E2%80%93GC%E2%80%93MS%20method&#038;body=https:\/\/fei-online.com\/quantitative-analysis-of-food-packaging-by-thermal-desorption-gc-ms-method\/' aria-hidden='false' data-av_icon='\ue805' data-av_iconfont='entypo-fontello' title='' data-avia-related-tooltip='Share by Mail'><span class='avia_hidden_link_text'>Share by Mail<\/span><\/a><\/li><\/ul><\/div><\/div><\/p><\/div><div class=\"flex_column av_one_fifth  flex_column_div av-zero-column-padding   avia-builder-el-8  el_after_av_three_fifth  avia-builder-el-last  \" style='border-radius:0px; 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