Study on the Analysis Method of Cadmium,Lead and Arsenic in 84％Copper Oxychloride Water Dispersible Granules
The content of cadmium,lead and arsenic in 84％copper oxychloride water dispersible granules(WG)was determined by atomic absorption spectrophotometry and atomic fluorescence spectrometry.Cadmium content was determined at 228.8nm and the lead content at 283.3nm by air-acetylene flame atomic absorption spectrometry.The content of arsenic was determined by argon As hollow cathode lamp atomic fluorescence spectrometry.The results showed linear correlation coefficients of 0.994 82,0.999 86 and 0.997 37,standard deviations of 0.039,0.18 and 0.005 2,coefficient of variation of 5.3％,5.6％and 3.2％,and average recoveries of 98.2％,94.5％and 101.9％for cadmium,lead,and arsenic,respectively.The method is simple,rapid,sensitive,precise and accurate,making it suitable for the quantitative analysis of cadmium,lead and arsenic.
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