{"id":17727,"date":"2024-09-19T15:28:15","date_gmt":"2024-09-19T13:28:15","guid":{"rendered":"https:\/\/www.vsl.nl\/uncategorized\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/"},"modified":"2025-08-29T10:21:49","modified_gmt":"2025-08-29T08:21:49","slug":"vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability","status":"publish","type":"post","link":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/","title":{"rendered":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability"},"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_1726752319168{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 css=&#8221;.vc_custom_1756455707006{margin-bottom: 0px !important;padding-bottom: 0px !important;}&#8221; el_class=&#8221;text-white&#8221;]<ins class=\"dg-post--date\" datetime=\"2025-08-29T07:23:56+00:00\">Published on September 19th 2024<\/ins><\/p>\n<h1>VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability<\/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 el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text css=&#8221;&#8221;]<\/p>\n<p class=\"header_subtext\">News<\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row equal_height=&#8221;yes&#8221; content_placement=&#8221;top&#8221;][vc_column el_class=&#8221;full_width_responsive dg-padding-none&#8221;][vc_column_text css=&#8221;&#8221;]The VSL primary ozone standard has once more passed the <a href=\"https:\/\/www.vsl.nl\/en\/about-vsl\/support\/\" target=\"_blank\" rel=\"noopener\">key comparison<\/a> in which it was compared with the international reference standard maintained by the Bureau International des Poids et Mesures (BIPM). This marks the fourth successful comparison since the start of the ongoing BIPM.QM-K1 key comparison in 2007 andfurther solidifying VSL\u2019s position as a leader in accurate and reliable ozone measurements.[\/vc_column_text][vc_column_text css=&#8221;&#8221;]The comparison was conducted in April 2024 and involved the precise measurement of ozone amount fractions across a spectrum spanning from 0 to 500 nmol\/mol. The results indicate a consistent degree of equivalence between the VSL and BIPM standards, with any observed deviations falling comfortably within the established uncertainty limits.[\/vc_column_text][vc_column_text css=&#8221;&#8221;]The BIPM.QM-K1 key comparison, initiated in 2007, plays a pivotal role in evaluating the degree of equivalence among ozone photometers utilised as national standards or primary standards within global networks dedicated to ambient ozone monitoring. By consistently participating in this comparison, VSL actively contributes to the advancement of ozone measurement accuracy on an international scale.[\/vc_column_text][vc_column_text css=&#8221;&#8221;]The results confirm VSL\u2019s metrological expertise, but also highlights its dedication to advancing scientific knowledge and supporting <a href=\"https:\/\/www.vsl.nl\/en\/themes\/environment\/\" target=\"_blank\" rel=\"noopener\">environmental monitoring<\/a> efforts worldwide. As ozone measurements are crucial for understanding and addressing air quality concerns, VSL\u2019s consistent accuracy and performance in this comparison reinforces the reliability of data collected using its primary ozone standard.[\/vc_column_text][vc_column_text css=&#8221;&#8221;]<\/p>\n<p><a href=\"https:\/\/iopscience.iop.org\/article\/10.1088\/0026-1394\/61\/1A\/08012\" target=\"_blank\" rel=\"noopener\">See the full report for more information.<\/a><\/p>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][\/vc_section]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability<\/p>\n","protected":false},"author":3,"featured_media":2419,"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-17727","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 Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability - 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-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability - VSL\" \/>\n<meta property=\"og:description\" content=\"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\" \/>\n<meta property=\"og:site_name\" content=\"VSL\" \/>\n<meta property=\"article:published_time\" content=\"2024-09-19T13:28:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-29T08:21:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"VSL_admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"VSL_admin\" \/>\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-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\"},\"author\":{\"name\":\"VSL_admin\",\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23\"},\"headline\":\"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability\",\"datePublished\":\"2024-09-19T13:28:15+00:00\",\"dateModified\":\"2025-08-29T08:21:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\"},\"wordCount\":431,\"image\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg\",\"articleSection\":[\"Health and Environment\",\"News\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\",\"url\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\",\"name\":\"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability - VSL\",\"isPartOf\":{\"@id\":\"https:\/\/www.vsl.nl\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg\",\"datePublished\":\"2024-09-19T13:28:15+00:00\",\"dateModified\":\"2025-08-29T08:21:49+00:00\",\"author\":{\"@id\":\"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage\",\"url\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg\",\"contentUrl\":\"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg\",\"width\":1920,\"height\":1080},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.vsl.nl\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability\"}]},{\"@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\/afec8fd6398b050db8b6014a5370fa23\",\"name\":\"VSL_admin\",\"sameAs\":[\"http:\/\/vsl.nl\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability - 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-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/","og_locale":"en_US","og_type":"article","og_title":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability - VSL","og_description":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability","og_url":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/","og_site_name":"VSL","article_published_time":"2024-09-19T13:28:15+00:00","article_modified_time":"2025-08-29T08:21:49+00:00","og_image":[{"width":1920,"height":1080,"url":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg","type":"image\/jpeg"}],"author":"VSL_admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"VSL_admin","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#article","isPartOf":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/"},"author":{"name":"VSL_admin","@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23"},"headline":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability","datePublished":"2024-09-19T13:28:15+00:00","dateModified":"2025-08-29T08:21:49+00:00","mainEntityOfPage":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/"},"wordCount":431,"image":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg","articleSection":["Health and Environment","News"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/","url":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/","name":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability - VSL","isPartOf":{"@id":"https:\/\/www.vsl.nl\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage"},"image":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg","datePublished":"2024-09-19T13:28:15+00:00","dateModified":"2025-08-29T08:21:49+00:00","author":{"@id":"https:\/\/www.vsl.nl\/#\/schema\/person\/afec8fd6398b050db8b6014a5370fa23"},"breadcrumb":{"@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#primaryimage","url":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg","contentUrl":"https:\/\/www.vsl.nl\/wp-content\/uploads\/2022\/11\/Ref_Groot.jpg","width":1920,"height":1080},{"@type":"BreadcrumbList","@id":"https:\/\/www.vsl.nl\/en\/news\/vsl-ozone-standard-passes-international-comparison-reaffirming-accuracy-and-reliability\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.vsl.nl\/en\/"},{"@type":"ListItem","position":2,"name":"VSL Ozone Standard Passes International Comparison, Reaffirming Accuracy and Reliability"}]},{"@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\/afec8fd6398b050db8b6014a5370fa23","name":"VSL_admin","sameAs":["http:\/\/vsl.nl"]}]}},"_links":{"self":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts\/17727","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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/comments?post=17727"}],"version-history":[{"count":0,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/posts\/17727\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/media\/2419"}],"wp:attachment":[{"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/media?parent=17727"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/categories?post=17727"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vsl.nl\/en\/wp-json\/wp\/v2\/tags?post=17727"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}