{"id":76469,"date":"2014-04-14T00:00:00","date_gmt":"2014-04-14T00:00:00","guid":{"rendered":"https:\/\/discover.restek.com\/?p=76469"},"modified":"2026-01-28T16:01:50","modified_gmt":"2026-01-28T16:01:50","slug":"to-15-dilution-factors-sample-volumes-and-the-all-new-mega-can-calculator-v1-02","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/de\/blogs-ja\/gnbl5546\/to-15-dilution-factors-sample-volumes-and-the-all-new-mega-can-calculator-v1-02","title":{"rendered":"TO-15 dilution factors, sample volumes, and the all new Mega Can Calculator \u2013 V1.02"},"content":{"rendered":"\n

So I was recently asked \u201chow do I calculate the dilution factor on a canister?\u201d Now ya\u2019ll get this blog as a direct result. So here we go with the following example\u2026<\/p>\n\n\n\n

First we start with a clean and fully evacuated canister. Regardless of size a fully evacuated canister will have a pressure of -14.696 psig (note the g for gauge). Also note that -14.696 psig = -29.92\u201d Hg.<\/p>\n\n\n\n

Next we ship the canister out to the field and a sample is collected. Typically a canister is sampled until -2.5 psig (-5.09\u201d Hg). Yes, not all of the canister is consumed. This has to do with the capabilities of maintaining \u201cconstant\u201d flow with a passive flow controller, but that is for another blog.<\/p>\n\n\n\n

From there we receive the canister in the lab and then very often the canister is pressured to 5 psig before analysis (this makes for faster loading of the sample onto the preconcentrator).<\/p>\n\n\n\n

So how much has my original sample been diluted by going from -2.5 psig to 5.0 psig. To calculate the dilution factor for this canister we use the following equation:<\/p>\n\n\n\n

Dilution Factor = [Pressure (after dilution) + Pressure (atmospheric)] \/ [Pressure (atmospheric) + Pressure (before dilution)]<\/p>\n\n\n\n

Dilution Factor = (5 psig + 14.696 psig) \/ (14.696 psig + (-2.5 psig) = 1.61<\/strong><\/p>\n\n\n\n

So the concentration we get out of this canister we multiply it by 1.61 to get the dilution corrected concentration.<\/p>\n\n\n\n

Now very often during the same conversation I get asked \u201cwhat is my sample volume?\u201d<\/p>\n\n\n\n

Keeping with the same example, we calculate the volume of sample in the canister by using the following equation:<\/p>\n\n\n\n

Sample Volume = Pressure Change \/ Initial Pressure x Canister Volume<\/p>\n\n\n\n

Sample Volume = -14.696 psig \u2013 (-2.5 psig) \/ -14.696 x 6000 mL<\/p>\n\n\n\n

Sample Volume = 4979 mL<\/strong><\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n



For those of you who do not want to reinvent the wheel… I now offer you the<\/p>\n\n\n\n

Mega Can Calculator \u2013 V1.02<\/strong><\/a><\/p>\n\n\n\n

Which includes dilution factors and sample volumes (before and post dilution).*<\/p>\n\n\n\n

*Model not included with calculator.<\/p>\n\n\n\n

<\/div>\n","protected":false},"excerpt":{"rendered":"

So I was recently asked “how do I calculate the dilution factor on a canister?” Now ya’ll get this blog as a direct result. So here we go with the following example… First we start with a clean and fully…<\/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":[794],"tags":[],"industries-application":[],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[2339],"hf_cat_post":[623],"ppma_author":[445],"class_list":["post-76469","post","type-post","status-publish","format-standard","hentry","category-blogs-ja","resource-technique-air-sampling-ja"],"acf":[],"taxonomy_info":{"category":[{"value":794,"label":"Blogs"}],"resource-technique":[{"value":2339,"label":"\u30a8\u30a2\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0"}]},"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":794,"name":"Blogs","slug":"blogs-ja","term_group":0,"term_taxonomy_id":794,"taxonomy":"category","description":"","parent":0,"count":442,"filter":"raw","cat_ID":794,"category_count":442,"category_description":"","cat_name":"Blogs","category_nicename":"blogs-ja","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. Herrington, PhD","avatar_url":{"url":"https:\/\/discover.restek.com\/wp-content\/uploads\/people-herrington-jason.png","url2x":"https:\/\/discover.restek.com\/wp-content\/uploads\/people-herrington-jason.png"},"0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/76469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/comments?post=76469"}],"version-history":[{"count":3,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/76469\/revisions"}],"predecessor-version":[{"id":85502,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/76469\/revisions\/85502"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/media?parent=76469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/categories?post=76469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/tags?post=76469"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/industries-application?post=76469"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/post-badge?post=76469"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-type?post=76469"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/product-library?post=76469"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-technique?post=76469"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/hf_cat_post?post=76469"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/ppma_author?post=76469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}