{"id":51599,"date":"2014-12-04T13:30:00","date_gmt":"2014-12-04T13:30:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/alternate-gc-carrier-gas-helium-to-nitrogen-30m-x-0-25mm-x-0-25m-column-to-20m-x-0-15mm-x-0-15m-column\/"},"modified":"2026-01-28T15:48:16","modified_gmt":"2026-01-28T15:48:16","slug":"alternate-gc-carrier-gas-helium-to-nitrogen-30m-x-0-25mm-x-0-25m-column-to-20m-x-0-15mm-x-0-15m-column","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/de\/blogs-ja\/gnbl4571\/alternate-gc-carrier-gas-helium-to-nitrogen-30m-x-0-25mm-x-0-25m-column-to-20m-x-0-15mm-x-0-15m-column","title":{"rendered":"Alternate GC Carrier Gas: Helium to Nitrogen, 30m x 0.25mm x 0.25\u00b5m Column to 20m x 0.15mm x 0.15\u00b5m Column"},"content":{"rendered":"\n

I sent my earlier post, \u201cSwitching from Helium to Nitrogen Carrier Gas for GC by Switching from a 30m x 0.25mm x 0.25\u00b5m Column to a 20m x 0.15mm x 0.15\u00b5m Column\u201d to Roy Lautamo at Restek West for review, as he has a critical eye for particulars.  He wanted to see finer detail in the elution area starting around 1400 sec in the first figure and took a sideways swipe at me by calling what I showed \u201cchromahistograms\u201d.  Indeed!  He also asked about peak widths, so I post some here for comparison, and I even included elution temperatures.  The zoomed in chromatograms in that 1400+ sec region look very similar to me.<\/p>\n\n\n

\n
\"Compare<\/figure>\n<\/div>\n\n
\n
\"1400<\/figure>\n<\/div>\n\n\n
<\/div>\n","protected":false},"excerpt":{"rendered":"

I sent my earlier post, “Switching from Helium to Nitrogen Carrier Gas for GC by Switching from a 30m x 0.25mm x 0.25µm Column to a 20m x 0.15mm x 0.15µm Column” to Roy Lautamo at Restek West for review,…<\/p>\n","protected":false},"author":2,"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":[2340],"hf_cat_post":[623],"ppma_author":[590],"class_list":["post-51599","post","type-post","status-publish","format-standard","hentry","category-blogs-ja","resource-technique-gas-chromatography-gc-ja"],"acf":[],"taxonomy_info":{"category":[{"value":794,"label":"Blogs"}],"resource-technique":[{"value":2340,"label":"\u30ac\u30b9\u30af\u30ed\u30de\u30c8\u30b0\u30e9\u30d5\u30a3\u30fc"}]},"featured_image_src_large":false,"author_info":{"display_name":"Patrick Gallagher","author_link":"https:\/\/discover.restek.com\/de\/author\/patrick-gallagherrestek-com\/"},"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":590,"user_id":0,"is_guest":1,"slug":"jack-cochran","display_name":"Jack Cochran","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/?s=96&d=mm&r=g","0":null,"1":"","2":"","3":"","4":"","5":"","6":"","7":"","8":""}],"_links":{"self":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/51599","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/comments?post=51599"}],"version-history":[{"count":3,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/51599\/revisions"}],"predecessor-version":[{"id":85211,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/51599\/revisions\/85211"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/media?parent=51599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/categories?post=51599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/tags?post=51599"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/industries-application?post=51599"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/post-badge?post=51599"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-type?post=51599"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/product-library?post=51599"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-technique?post=51599"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/hf_cat_post?post=51599"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/ppma_author?post=51599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}