If You Are at NEMC in San Antonio…Visit My Poster After the Morning 8270 Session

My colleague Michelle did some excellent work demonstrating how to maintain the separation of critical pairs while trimming up to half the length of the analytical column. I know from the technical service calls which are forwarded to me that loss of resolution after column maintenance is an issue many of you struggle with. I will be available to answer questions about her work tomorrow (Tuesday, August 6th) after the morning session. I hope to see you there.

column trimming

One Response to “If You Are at NEMC in San Antonio…Visit My Poster After the Morning 8270 Session”

  1. Dan says:

    Would anyone know about the flame retardant Decabromodiphenyl ether…specifically, I’m looking at a lot of different food and water extracts with a Rxi-5ms 30 x 0.25 x 0.25. From what I gather, Deca-BDE takes forever to elute at routine oven temperature ramps (only going up to 300 deg). If it was in our samples and our multi-residue extracts, we would miss it. Could it’s presence be inferred from any breakdown products or impurities that elute earlier? I realize the thinner film, shorter column is better here, but we’ll probably have to stick with the 30 x 0.25 x 0.25 Rxi-5ms column because it’s so versatile and useful for so many analytes. I remember reading that one of the poly-brominated pyrethrins got thermally degraded (de-brominated under normal GC and inlet temperatures) to an earlier-eluting peak. I’m mainly interested in detecting a wide range of contaminants using multi-residue extracts and the mentioned column…even if we couldn’t get a Deca-BDE peak and quantitate it, it would still be useful to infer the presence of brominated flame retardants from any other peaks such as breakdown products or lower molecular weight impurities originally present in the Deca-BDE formulation.
    This question probably belongs in an older topic elsewhere…sorry!

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