Co - Eluting Sulfur Compounds

Chromatography Forum: GC Archives: Co - Eluting Sulfur Compounds
Top of pagePrevious messageNext messageBottom of pageLink to this message  By Brian Starr on Wednesday, July 17, 2002 - 11:16 am:

Our lab implementing new method. We are interested in maximizing identified's and minimizing un-identified's in petroleum gas matrix. We currently run 50 m non-polar column; detection is by Sulfur Chemiluminescence. We are experiencing very poor resolution between Hydrogen Sulfide and Carbonyl Sulfide. Does anyone have idea on remedy short of column change? Current column performs very well for all other sulfur compounds in our samples. Thanks in advance for any help.


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Paul on Tuesday, July 30, 2002 - 04:46 am:

Dear Brian
are you able to reduce the start temperature of your method, perhaps by using liq CO2? If not then the column I use to separate H2S, CO2, DMS and CS2 is a 30m x 0.32mm I.D x 5um J&W DB-1. The start temp is 50oC, using He carrier at 16psi. The resolution between all peaks is excellent.


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Brian Starr on Wednesday, July 31, 2002 - 12:18 pm:

Many thanks Paul! Our lab is not currently plumbed for cryogenics. Sounds like your column selection beats ours! The difference may be that your column's liquid phase thickness is greater than ours resulting in superior resolution. We will very likely try a column similar to yours. Thanks again.


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