【摘要】 <正> 一、前言海洋环境中有机氯农药含量的测定,目前受到比较广泛的重视。海洋环境中本来并不存在有机氯农药666和DDT这些化学污染物。它们是由人类在工农业和卫生防疫等活动中撒播,从河流、排污渠道及大气传输进入海洋环境的。海洋环境中有机氯农药含量很低,在ppt级水平,因此,要求有一个尽可能灵敏的测定方法。方法的关键问题是666、DDT广泛存在于蒸馏水、化学试剂之中,存在于玻璃器皿壁上。我们购进的化学试剂,如正已烷含技α—666在785—1.65×10~3ppt之间;市售蒸馏水含α—666在150ppt左右。这样的试剂显然不能直接运用于海洋环境中有机氯农药的超痕量分析。因此,试剂要求严格的纯化处理,才更多还原

【Abstract】 The reduce of the systematic blank of the analytical method is the key in the determination of super-trace organic chlorinated pesticides, which directly affects the lowest detection limit and the detection accuracy of the method used. In our exploration of this problem, we have developed a set of processing method in the determination of super-trace organic chlorinated pesticides, including simple processing, reagent purification and instrument cleaning. The method has been succesively applied in the determination of chlorinated pesticides in water and sediment from the Xiamen Harbour.更多还原