Yang Xiao-hui
2007
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Journal
Science Technology and Engineering
Abstract
In order to determine 3,5-dichlorobenzoyl chloride by charge-transfer spectrophotometry,the absorbency of charge-transfer complex formed between p-benzoquinone and 3,5-dichloro-N-hytroxybenzoylamine(DCHA) in cetylpyridinium chloride(CPC) was determined at 485 nm,and the DCHA was formed by the 3,5-dichlorobenzoyl chloride reacted with hydroxylamine.The results showed that linear range of ethyl 3,5-dichlorobenzoate was(0.30~4.00) mg/L with a detection limit of 0.15 mg/L,the correlation coefficient(r) was 0.999 2 under the optimal conditions.The method has been applied to the determination of sample,its RSD was 3.65%(n=6) ,recovery was in the range of 97.3%~100.1%.The method is simple with easily-controlled reaction conditions and high sensitivity.The results is satisfactory.