{"id":51829,"date":"2013-10-29T14:30:00","date_gmt":"2013-10-29T14:30:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/to-15-canister-relative-humidity-part-iiib-humidifying-your-sample-my-preferred-approach\/"},"modified":"2025-12-12T20:31:50","modified_gmt":"2025-12-12T20:31:50","slug":"to-15-canister-relative-humidity-part-iiib-humidifying-your-sample-my-preferred-approach","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/de\/blogs-de\/gnbl4835\/to-15-canister-relative-humidity-part-iiib-humidifying-your-sample-my-preferred-approach","title":{"rendered":"TO-15 Canister Relative Humidity: Part IIIb (Humidifying Your Sample&#8230; My Preferred Approach)"},"content":{"rendered":"\n<p>So let us recap this multi-blog series on relative humidity (RH):<\/p>\n\n\n\n<p>Part I \u2013&nbsp;&nbsp;We learn what is RH and why do we care about it when sampling\/analyzing whole air canister samples for volatile organic compounds (VOCs).<\/p>\n\n\n\n<p>Part II \u2013&nbsp;We learn how to calculate the theoretical % RH in a canister.<\/p>\n\n\n\n<p>Part IIIa \u2013&nbsp;We learn how to generate a humidified blank by direct injection of DI water.<\/p>\n\n\n\n<p>Now\u2026 time for me to show you (in the following&nbsp;<strong>VIDEO<\/strong>) how I prefer to humidify my blanks and standards with the use of our humidification chamber (catalog #&nbsp;24282) and vacuum\/pressure gauge (catalog #&nbsp;24285):<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Humidify Your TO-15 Air Cans Quickly and Easily Using the Restek\u00ae Humidification Chamber\" width=\"720\" height=\"540\" src=\"https:\/\/www.youtube.com\/embed\/5wgYskSq9AU?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><\/figure>\n\n\n\n<p>One very important part I left out on the video: Be very careful if you are relying on your dynamic diluter to generate your humidified blanks and\/or standards. Some diluters do not even come equipped with a humidification chamber. While other diluters have a humidification chamber; however, the effluent gas stream may not be reaching the RH levels you are trying to achieve. For example: One customer was shocked to see that their gas stream was only reaching 18% RH @ a 1 L\/min flow rate and only 12% RH @ a 5 L\/min flow rate (see picture below\u2026 you should recognize my equilibration chamber and Extech hygrometer). Now\u2026 18% RH may not be that bad\u2026 if your samples are coming from the Gobi Desert. However, if you want to obtain higher RH levels with such a diluter you will need to supplement your blanks\/standards with a direct shot of DI (as shown in&nbsp;<a href=\"https:\/\/discover.restek.com\/blogs\/to-15-canister-relative-humidity-part-iiia-humidifying-your-sample\" data-type=\"link\" data-id=\"https:\/\/discover.restek.com\/blogs\/to-15-canister-relative-humidity-part-iiia-humidifying-your-sample\">Part IIIa<\/a>) prior to hooking up to your diluter.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-to-15-canister-relative-humidity-part-iiib-humidifying-your-sample.-my-preferred-approach-01-1024x768.jpg\" alt=\"\" class=\"wp-image-17248\" title=\"-\" srcset=\"https:\/\/discover.restek.com\/wp-content\/uploads\/blog-to-15-canister-relative-humidity-part-iiib-humidifying-your-sample.-my-preferred-approach-01-1024x768.jpg 1024w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-to-15-canister-relative-humidity-part-iiib-humidifying-your-sample.-my-preferred-approach-01-300x225.jpg 300w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-to-15-canister-relative-humidity-part-iiib-humidifying-your-sample.-my-preferred-approach-01-768x576.jpg 768w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-to-15-canister-relative-humidity-part-iiib-humidifying-your-sample.-my-preferred-approach-01-1536x1152.jpg 1536w, https:\/\/discover.restek.com\/wp-content\/uploads\/blog-to-15-canister-relative-humidity-part-iiib-humidifying-your-sample.-my-preferred-approach-01-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Stay tuned for part IV where I finally show you why I am making such a big deal about RH!<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n        <div class=\"cpb\">\n            <h3 class=\"cpb-heading\">Products Mentioned<\/h3>\n            <hr class=\"cpb-heading-underline\" \/>\n            <div class=\"cpb-list\">\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/24282\">                                Catalog No. 24282                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Befeuchtungskammer<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/24282\">Produkt anzeigen<\/a>\n                                                    <\/div>\n                    <\/div>\n                                    <div class=\"cpb-item\">\n                        <div class=\"cpb-col cpb-col--left\">\n                            <a class=\"cpb-catalog\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/24285\">                                Catalog No. 24285                            <\/a>                        <\/div>\n                        <div class=\"cpb-col cpb-col--middle\">\n                            <div class=\"cpb-title\">Pr\u00fcfmanometer, Ashcroft, Analog, 6&quot; Durchmesser, 1\/4&quot; NPT, 30&quot; Hg bis 60 psi<\/div>\n                        <\/div>\n                        <div class=\"cpb-col cpb-col--right\">\n                                                            <a class=\"cpb-view-btn\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/de.restek.com\/p\/24285\">Produkt anzeigen<\/a>\n                                                    <\/div>\n                    <\/div>\n                            <\/div>\n        <\/div>\n        \n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>So let us recap this multi-blog series on relative humidity (RH): Part I &ndash; We learn what is RH and why do we care about it when sampling\/analyzing whole air canister samples for volatile organic compounds (VOCs). Part II &ndash;&#8230;<\/p>\n","protected":false},"author":25,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[792],"tags":[],"industries-application":[2231,2230],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[2323,2324,2328],"hf_cat_post":[623],"ppma_author":[445],"class_list":["post-51829","post","type-post","status-publish","format-standard","hentry","category-blogs-de","industries-application-luftprufung","industries-application-umweltbereich","resource-technique-luftprobenahme","resource-technique-gaschromatographie-gc","resource-technique-massenspektrometrie-ms"],"acf":[],"taxonomy_info":{"category":[{"value":792,"label":"Blogs"}],"industries-application":[{"value":2231,"label":"Luftpr\u00fcfung"},{"value":2230,"label":"Umweltbereich"}],"resource-technique":[{"value":2323,"label":"Luftprobenahme"},{"value":2324,"label":"Gaschromatographie (GC)"},{"value":2328,"label":"Massenspektrometrie (MS)"}]},"featured_image_src_large":false,"author_info":{"display_name":"Jason S. Herrington, PhD","author_link":"https:\/\/discover.restek.com\/de\/author\/jason-s-herrington-phd\/"},"comment_info":0,"category_info":[{"term_id":792,"name":"Blogs","slug":"blogs-de","term_group":0,"term_taxonomy_id":792,"taxonomy":"category","description":"","parent":0,"count":442,"filter":"raw","cat_ID":792,"category_count":442,"category_description":"","cat_name":"Blogs","category_nicename":"blogs-de","category_parent":0}],"tag_info":false,"authors":[{"term_id":445,"user_id":25,"is_guest":0,"slug":"jason-s-herrington-phd","display_name":"Jason S. 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