Hansen L B, Castillo G D, Biehl E R
J Assoc Off Anal Chem. 1981 Sep;64(5):1232-7.
Four alteration products of malathion have been observed in crop extracts of rice, which may not be readily identifiable in a typical gas chromatographic-mass spectrometric (GC-MS) analysis of the residues. Extracts of rice containing malathion and several related compounds were analyzed on gas-liquid chromatographic (GLC) columns of different polarities. The methyl ethyl succinate ester of malathion co-elutes with malaoxon from a nonpolar GLC column. Retention data and GC-MS analysis indicate the presence of 3 previously reported compounds. Evidence was obtained for a fourth compound, O-methyl O-ethyl S-(1,2-bis-carbethoxy) ethyl phosphorodithioate, apparently resulting from the environmental alteration of malathion.
在水稻作物提取物中观察到了马拉硫磷的四种转化产物，在对这些残留物进行典型的气相色谱 - 质谱（GC-MS）分析时可能难以轻易识别。对含有马拉硫磷和几种相关化合物的水稻提取物在不同极性的气液色谱（GLC）柱上进行了分析。马拉硫磷的丁二酸甲乙酯与马拉氧磷在非极性GLC柱上共洗脱。保留数据和GC-MS分析表明存在3种先前报道的化合物。还获得了关于第四种化合物O-甲基-O-乙基-S-(1,2-双-乙氧羰基)乙基二硫代磷酸酯的证据，它显然是由马拉硫磷的环境转化产生的。
