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- Posts: 5
- Joined: Mon Jul 17, 2017 1:54 pm
In the past our method that we developed following the guidelines from Supelco who had done SPME of Odors in Drinking Water, for Analysis by GC?MS (but the sample size was 2ppt) used the Splitless mode, so that's what we did with ALL of our samples and standards. But we were never confident in any of the results we got on our samples.
However, we are beginning to follow the protocols set out in Standards Methods for 6040D, and the majority of our calibration curve standards are 10ng/L or higher (5ng/L, 10ng/L, 20ng/L, 50ng/L, 100ng/L, and 200ng/L). Should we actually use Split mode? Or stick with the Splitless? We aren't sure what the concentrations in our reservoir waters or drinking waters are going to be on a routine basis. When we have had taste and odor problems, the levels we have had tested by an outside laboratory had results of 80-90ppt in the drinking water.
Suggestions and advice welcome.