{"id":2992,"date":"2022-12-22T12:01:22","date_gmt":"2022-12-22T10:01:22","guid":{"rendered":"https:\/\/www.vsl.nl\/uncategorized\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/"},"modified":"2025-08-29T10:24:20","modified_gmt":"2025-08-29T08:24:20","slug":"vsl-develops-gas-standards-for-portable-emission-measurement-system-pems","status":"publish","type":"post","link":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/","title":{"rendered":"VSL develops gas standards for portable emission measurement system (PEMS)"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_section full_width=&#8221;stretch_row&#8221; content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1669824595909{background-image: url(https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg?id=2418) !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}&#8221; el_class=&#8221;main_header gradient_header dg-position-realtive&#8221;][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;middle&#8221; el_class=&#8221;dg-header&#8211;small&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;dg-padding-none full_width_responsive&#8221;][vc_column_text el_class=&#8221;text-white&#8221; css=&#8221;.vc_custom_1669823990797{margin-bottom: 0px !important;padding-bottom: 0px !important;}&#8221;]<br \/>\n<ins class=\"dg-post--date\" datetime=\"2025-08-29T07:23:56+00:00\">Published on December 22nd 2022<\/ins><\/p>\n<h1>VSL develops gas standards for portable emission measurement system (PEMS)<\/h1>\n<p>[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][\/vc_section][vc_section el_class=&#8221;dg-padding-mid&#8221;][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text]<\/p>\n<p class=\"header_subtext\">News<\/p>\n<h2>VSL develops gas standards for portable emission measurement system (PEMS)<\/h2>\n<p>European legislation sets strict limits on nitrogen oxides (NOx) and particulate matter (PN) emitted from vehicle exhaust, as both are a major source of air pollution and are hazardous to human health. Emission tests with real car journeys have recently been introduced in the EU to provide a more realistic picture of these vehicle emissions. Such tests are performed with Portable Emissions Measurement Systems (PEMS) that allow real-world testing of emissions, but a full metrological characterization of these systems is currently lacking. VSL is a partner of the MetroPEMS project ((2020-2023), <a href=\"https:\/\/lnkd.in\/exPVpDmc\">https:\/\/lnkd.in\/exPVpDmc<\/a>), which addresses the need for PEMS calibration standards and guidelines.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text]VSL develops reliable gas standards for testing and calibration of PEMS instruments. Nitrogen dioxide (NO2) at high mole fractions (&gt; 500 \u00b5mol\/mol) is one of the most important components in such gas standards. Gas standards with a low NO2 mole fraction (&lt; 10 \u00b5mol\/mol) pose an analytical problem due to the unavoidable presence of nitric acid (HNO3), as recently shown in an international comparison (h<a href=\"https:\/\/lnkd.in\/dYGbvhBB\">ttps:\/\/lnkd.in\/dYGbvhBB<\/a>), but high NO2 mole fractions, as relevant for portable emission measurement systems, are even more challenging. This is due to the formation of N2O4, the NO2 dimer.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text]VSL has prepared several NO2 gas standards in the range of 500-2500 \u00b5mol\/mol, including binary gas standards of NO2 in synthetic air and multi-component mixtures containing nitric oxide, carbon monoxide, carbon dioxide and NO2, in nitrogen.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_single_image image=&#8221;2744&#8243; img_size=&#8221;full&#8221;][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text]The stability of the developed gas standards is currently being checked with various analytical techniques, including VSL&#8217;s new FTIR spectrometer facility, which allows the accurate quantification of both nitric acid and the NO2 dimer. The results of the first 6 months of stability testing are promising and this research will be continued to obtain 1 year stability data. The graph shows the VSL experimental data for the quantification of N2O4 in the binary NO2 gas standards and a simulation based on an equilibrium model for comparison. The results of this developmental study will be published.[\/vc_column_text][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column width=&#8221;5\/6&#8243; el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_single_image image=&#8221;2746&#8243; img_size=&#8221;full&#8221;][\/vc_column][vc_column width=&#8221;1\/6&#8243;][\/vc_column][\/vc_row][\/vc_section]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>European legislation sets strict limits on nitrogen oxides (NOx) and particulate matter (PN) emitted from vehicle exhaust, as both are a major source of air pollution and are hazardous to human health. Emission tests with real car journeys have recently been introduced in the EU to provide a more realistic picture of these vehicle emissions. <\/p>\n","protected":false},"author":4,"featured_media":1666,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[79,44],"tags":[],"class_list":["post-2992","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health-and-environment","category-news","category-79","category-44","description-off"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>VSL develops gas standards for portable emission measurement system (PEMS) - VSL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VSL develops gas standards for portable emission measurement system (PEMS) - VSL\" \/>\n<meta property=\"og:description\" content=\"European legislation sets strict limits on nitrogen oxides (NOx) and particulate matter (PN) emitted from vehicle exhaust, as both are a major source of air pollution and are hazardous to human health. Emission tests with real car journeys have recently been introduced in the EU to provide a more realistic picture of these vehicle emissions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\" \/>\n<meta property=\"og:site_name\" content=\"VSL\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-22T10:01:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-29T08:24:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"455\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Birgit De Cort\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Birgit De Cort\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\"},\"author\":{\"name\":\"Birgit De Cort\",\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/9ad05df07de1d4decd1563f7a3728a85\"},\"headline\":\"VSL develops gas standards for portable emission measurement system (PEMS)\",\"datePublished\":\"2022-12-22T10:01:22+00:00\",\"dateModified\":\"2025-08-29T08:24:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\"},\"wordCount\":659,\"image\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png\",\"articleSection\":[\"Health and Environment\",\"News\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\",\"url\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\",\"name\":\"VSL develops gas standards for portable emission measurement system (PEMS) - VSL\",\"isPartOf\":{\"@id\":\"https:\/\/www.vsl.nl\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png\",\"datePublished\":\"2022-12-22T10:01:22+00:00\",\"dateModified\":\"2025-08-29T08:24:20+00:00\",\"author\":{\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/9ad05df07de1d4decd1563f7a3728a85\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage\",\"url\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png\",\"contentUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png\",\"width\":1280,\"height\":455},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.vsl.nl\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"VSL develops gas standards for portable emission measurement system (PEMS)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.vsl.nl\/#website\",\"url\":\"https:\/\/www.vsl.nl\/\",\"name\":\"VSL\",\"description\":\"Nationaal Metrologisch Instituut\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.vsl.nl\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/9ad05df07de1d4decd1563f7a3728a85\",\"name\":\"Birgit De Cort\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"VSL develops gas standards for portable emission measurement system (PEMS) - VSL","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/","og_locale":"en_US","og_type":"article","og_title":"VSL develops gas standards for portable emission measurement system (PEMS) - VSL","og_description":"European legislation sets strict limits on nitrogen oxides (NOx) and particulate matter (PN) emitted from vehicle exhaust, as both are a major source of air pollution and are hazardous to human health. Emission tests with real car journeys have recently been introduced in the EU to provide a more realistic picture of these vehicle emissions.","og_url":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/","og_site_name":"VSL","article_published_time":"2022-12-22T10:01:22+00:00","article_modified_time":"2025-08-29T08:24:20+00:00","og_image":[{"width":1280,"height":455,"url":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png","type":"image\/png"}],"author":"Birgit De Cort","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Birgit De Cort","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#article","isPartOf":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/"},"author":{"name":"Birgit De Cort","@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/9ad05df07de1d4decd1563f7a3728a85"},"headline":"VSL develops gas standards for portable emission measurement system (PEMS)","datePublished":"2022-12-22T10:01:22+00:00","dateModified":"2025-08-29T08:24:20+00:00","mainEntityOfPage":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/"},"wordCount":659,"image":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png","articleSection":["Health and Environment","News"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/","url":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/","name":"VSL develops gas standards for portable emission measurement system (PEMS) - VSL","isPartOf":{"@id":"https:\/\/www.vsl.nl\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage"},"image":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png","datePublished":"2022-12-22T10:01:22+00:00","dateModified":"2025-08-29T08:24:20+00:00","author":{"@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/9ad05df07de1d4decd1563f7a3728a85"},"breadcrumb":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#primaryimage","url":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png","contentUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/10\/VSL_Gebouw.png","width":1280,"height":455},{"@type":"BreadcrumbList","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-develops-gas-standards-for-portable-emission-measurement-system-pems\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.vsl.nl\/en\/"},{"@type":"ListItem","position":2,"name":"VSL develops gas standards for portable emission measurement system (PEMS)"}]},{"@type":"WebSite","@id":"https:\/\/www.vsl.nl\/#website","url":"https:\/\/www.vsl.nl\/","name":"VSL","description":"Nationaal Metrologisch Instituut","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.vsl.nl\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/9ad05df07de1d4decd1563f7a3728a85","name":"Birgit De Cort"}]}},"_links":{"self":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts\/2992","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/comments?post=2992"}],"version-history":[{"count":0,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts\/2992\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/media\/1666"}],"wp:attachment":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/media?parent=2992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/categories?post=2992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/tags?post=2992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}