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    Spectrophotometric determination of trace quaternary phosphonium salts in water with m-nitrophenol

    Spectrophotometric determination of trace quaternary phosphonium salts in water with m-nitrophenol by JIANG Chen-jing, WU Yu-yong, FANG Cheng-ran, HE Ruo, SHEN Dong-sheng

    Published 2010-07-01

    A novel method was established for spectrophotometric chromogenic reaction of m-nitrophenol with cationic surfactants to determine the trace quaternary phosphonium salts in water. The optimal analytic condition was obtained as follows: reaction time 10 min, sodium hydroxide 2.00 mL, m-nitrophenol 1....

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