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文献和实验Enantioselective Determination of -Hexachlorocyclohexane in Food Samples by GC-MS
extraction (SPE) column, and final determination by gas chromatography/electron capture negative ion mass spectrometry (GC-MS/ECNI) on a Chirasil-Dex column. The MS is operated in selected ion monitoring mode. Racemic α-HCH is used as the calibration standard
Automated Trace Analysis of Pesticides in Water
An automated system appropriate for the analysis of a variety of chemical classes of pesticides and conversion products in water is presented. The system is based on the online solid-phase extraction (SPE) of target solutes followed by high
Quantitation of Sirolimus Using Liquid Chromatography-Tandem Mass Spectrometry (LC-MS-MS)
, DE); two position switching valve (Valco, Houston, TX); 10 mm guard cartridge (C18 ) used as an extraction column (Perkin Elmer, Norwalk, CT); analytical column (Nova-Pak C18 column, 2.1 � 150 mm I.D., 4 μm, Waters Corp, Milford, MA) maintained at 65�C; extraction
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