{"id":51777,"date":"2020-05-20T14:30:00","date_gmt":"2020-05-20T14:30:00","guid":{"rendered":"https:\/\/discover.restek.com\/uncategorized\/proezgc-chromatogram-modeler-there-is-much-more-to-the-program-than-just-the-welcome-screen\/"},"modified":"2026-01-28T15:58:56","modified_gmt":"2026-01-28T15:58:56","slug":"proezgc-chromatogram-modeler-there-is-much-more-to-the-program-than-just-the-welcome-screen","status":"publish","type":"post","link":"https:\/\/discover.restek.com\/de\/blogs-de\/gnbl4772\/proezgc-chromatogram-modeler-there-is-much-more-to-the-program-than-just-the-welcome-screen","title":{"rendered":"ProEZGC Chromatogram Modeler \u2013 there is much more to the program than just the Welcome Screen"},"content":{"rendered":"\n

When you log into the ProEZGC Chromatogram Modeler software, you will see the screen below, which is what I refer to as the Welcome Screen. This is the starting point for all, and unfortunately all some customers will think there is to the ProEZGC software.<\/p>\n\n\n\n

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

For those of you who have used ProEZGC, you know that all you need to do is to add a compound name or CAS# into the box titled Search by Name or CAS#<\/strong> to get started (remember, only one compound name or CAS# per line).<\/p>\n\n\n\n

For this post, I would like you all to see that there is more to ProEZGC than just the screen above and the screen below. In this example, I typed in the names of four common compounds\/solvents and clicked the blue Solve<\/strong> button.<\/p>\n\n\n

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

After reviewing the search results for all stationary phases, I selected the results for the Rtx-502.2 column.<\/p>\n\n\n

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

I then clicked on the Conditions<\/strong> tab (the dark blue tab between Compounds<\/strong> and My EZGC<\/strong>) and were presented with a new page (see below).<\/p>\n\n\n

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

From this page you can choose different dimensions of the same column (in this case, the Rtx-502.2), modify the GC oven temperature program, and if you select Custom<\/strong> at the bottom of the page in the Results<\/strong> section, you can change carrier gas flow rates (see screen below) and a few other parameters.<\/p>\n\n\n

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

Notice the blue arrow under Control Parameters<\/strong> and to the right of Column Flow <\/strong>in the screen above?  So what does the arrow represent? It allows you to change the remaining top parameters (Column Flow, Average Velocity, Holdup Time<\/strong> and\/or Inlet Pressure<\/strong> – whichever parameters the arrow is not<\/em> pointing to) in the Control Parameters<\/strong> section without affecting the parameter the arrow is<\/em> pointing to.  See example below.  Notice that I moved the arrow from Column Flow<\/strong> to Average Velocity<\/strong> by double-clicking in the empty space to the left of 39.70 cm\/sec.<\/p>\n\n\n

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

By keeping the Average Velocity<\/strong> the same and changing the length of the capillary column, notice how the Column Flow<\/strong> (carrier gas flow rate value) increases, as do the Holdup Time* and Inlet Pressure.<\/p>\n\n\n\n

    \n
  • Holdup Time is the time it takes for a non-retained compound to travel through the column.<\/li>\n<\/ul>\n\n\n
    \n
    \"\"<\/figure>\n<\/div>\n\n\n

    One last comment; under Results<\/strong> you have three selections to pick from.  The default is Speed<\/strong>, and for most analysis this is fine.  As the name implies, when this button is selected, analysis times are minimized.  I showed you all how to select the Custom<\/strong> button for the most control of carrier gas parameters.  My favorite button, however, is Efficiency<\/strong>.  Analysis times may be a little longer, but separations are usually improved, and that is my goal, to show a customer maximum compound separation with reasonable analysis times.<\/p>\n\n\n

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

    If you have never seen or tried changing conditions by selecting the Conditions<\/strong> tab, I encourage you to do so. To learn more about Pro EZGC, visit the Help Section and the Restek Video Library. Let us know if you have any questions.<\/p>\n\n\n\n

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

    When you log into the ProEZGC Chromatogram Modeler software, you will see the screen below, which is what I refer to as the Welcome Screen. This is the starting point for all, and unfortunately all some customers will think there…<\/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":[792],"tags":[],"industries-application":[],"post-badge":[],"resource-type":[],"product-library":[],"resource-technique":[2324],"hf_cat_post":[623],"ppma_author":[582],"class_list":["post-51777","post","type-post","status-publish","format-standard","hentry","category-blogs-de","resource-technique-gaschromatographie-gc"],"acf":[],"taxonomy_info":{"category":[{"value":792,"label":"Blogs"}],"resource-technique":[{"value":2324,"label":"Gaschromatographie (GC)"}]},"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":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":582,"user_id":0,"is_guest":1,"slug":"alan-sensue","display_name":"Alan Sensue","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\/51777","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=51777"}],"version-history":[{"count":3,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/51777\/revisions"}],"predecessor-version":[{"id":85434,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/posts\/51777\/revisions\/85434"}],"wp:attachment":[{"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/media?parent=51777"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/categories?post=51777"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/tags?post=51777"},{"taxonomy":"industries-application","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/industries-application?post=51777"},{"taxonomy":"post-badge","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/post-badge?post=51777"},{"taxonomy":"resource-type","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-type?post=51777"},{"taxonomy":"product-library","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/product-library?post=51777"},{"taxonomy":"resource-technique","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/resource-technique?post=51777"},{"taxonomy":"hf_cat_post","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/hf_cat_post?post=51777"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/discover.restek.com\/de\/wp-json\/wp\/v2\/ppma_author?post=51777"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}