OVI METHOD FIVE

Chromatography Forum: GC Archives: OVI METHOD FIVE
Top of pagePrevious messageNext messageBottom of pageLink to this message  By Anonymous on Monday, April 28, 2003 - 07:43 pm:

We have been struggling with an OVI method 5 analysis in DMSO for methylene chloride. We have recently noticed that the method barely works with all of the solvents in the standard and does not work with only the methylene chloride. Anyone know why. Also DMSO does not want to work on my HP GC very well.


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Ralph on Wednesday, April 30, 2003 - 04:03 am:

Is this a method for volatiles in water which you extract with DMSO?
Have you had a chance to try a standard hydrocarbon mix in something like hexane to see if response/retention time and peak shape look normal?


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Anonymous on Wednesday, April 30, 2003 - 01:39 pm:

What inlet temperature are you using?


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Anonymous on Wednesday, April 30, 2003 - 08:58 pm:

USP OVI Method Five requires an inlet temperature of 140C despite this being below the boiling point of of DMSO. Also the analyte that I meant to refer to is the chloroform.


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