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4 of the 5 organochlorine pesticides were not detected in the analysis. It would be essential to specify what is considered to be a legally unacceptable concentration of these compounds and how these levels relate to the levels detectable by the analysis. If the unacceptable level is for examle 50ng/L then the improved extraction etc... has no actual benefit. This seems not to have been considered at all.
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zhenghaiw(½ð±Ò+1): ¸Ðл½â´ð 2011-05-12 23:00:02
gaozhanqi(½ð±Ò+2): ºÜÓаïÖú£¬Ð»Ð» 2011-05-13 08:20:59
gaozhanqi(½ð±Ò+2): 2011-05-13 14:52:16
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