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A Classes of Compounds Described in the Guide I A
ANCILLARY TECHNIQUES IV A
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1-liter acetonitrile added adsorbent aldrin aliquot Analyze by method anhydrous sodium sulfate anionic applications aqueous Assoc beaker benzene Burchfield capacity centrifuge Chemists chlorinated hydrocarbons Chlorinated Pesticide chloroform chromatographic column cleaned concentrated Confirm by method containing demeton detection determinative step dieldrin diethyl ether electron capture detector eluate eluted endosulfan endrin equipment Erlenmeyer flask esters ethanol ether in petroleum evaporated Extract by method EXTRACTION AND CLEANUP Florisil fraction free acids further cleanup gas chromatography glass heptachlor hexane impurities laboratory lindane lipids method V. A. Methods Cont'd methyl minutes mixture nonionic pesticides nonpolar note on procedure obtained organic phosphates organic solvent oxidation partition peak Pesticide Residues pesticide standards petroleum ether phase plant tissues polar portions prior reagents recovery redistilled removed residue analysis retention rinsed sample extract Section separate separatory funnel sodium sulfate solvent sulfur tetradifon tissue extracts transferred tube Waring blendor washed