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采用气相色谱法对肯尼亚沿Nzoia河9个地点的水样和沉积物样中草不绿(也称杂草锁)(α’-氯-N-(2,6-二乙基苯基)-N-(甲氧基甲基)乙酰胺)、甲氧毒草安(α-氯6’-乙基-N-(2甲氧基-1-甲基乙基)乙酰邻甲苯胺)及它们各自环境稳定的苯胺类降解物2,6-二乙基苯胺、2-乙基-6-甲基苯胺进行分析。降解物在90%以上的沉积物样和水样中检出,而母体化合物只在不到14%的水样中检出。沉积物中的杀虫剂和它们的降解物比在水中浓度高很多(1.4～10 800倍),显示出化合物在沉积物中的积累。在研究时间内沉积物中降解物的普遍存在意味着这些化合物的持续性。可以假定在热带气候为主的条件下,促使杀虫剂快速分解为环境稳定的降解物,从而在研究区域内使后者成为比其母体更重要的污染物。
Gas chromatographic analysis was performed on water samples and sediment-like samples from nine locations along the Nzoia River in Kenya (aka weed lock) (α’-chloro-N- (2,6-diethylphenyl) (Methoxymethyl) acetamide), metolachlor (alpha-chloro 6’-ethyl-N- (2methoxy- 1 -methylethyl) acetylolaniline) and their respective Environmentally stable aniline degradation 2,6-diethyl aniline, 2-ethyl-6-methyl aniline for analysis. Degradation was detected in more than 90% of sediment samples and water samples while the parent compound was only detected in less than 14% of water samples. Insecticides and their degradation products in sediments are much higher (1.4 to 10 800 times) than in water, indicating the accumulation of the compounds in the sediments. The prevalence of degradants in sediments during the study period means the persistence of these compounds. It can be assumed that, under tropical climates, insecticides are rapidly decomposed into environmentally stable degradants, making the latter a more important pollutant than their mother in the study area.