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1 前言鱼体中一般含微最汞,其食用容许含量为0.3mg/Kg以下。常规分析中,多采用光度法及原子吸收法。本文研究了用电位溶出法(PSA法)测定汞的适宜条件。试验表明,在pH2.83～5.02之间,0.075MNaCl为介质,3.00×10~(-4)MKMnO_4作氧化剂,有0.04mg/lCu(Ⅱ)作为敏化剂的条件下,用电位溶出分析法可测定鱼体中的微量汞。其结果与光度法一致。鱼中汞亦可用Wall—Jet电极电化学检测器的流动注射分析法测定,其结果与上述常规
1 Introduction Fish generally contain the most mercury, its allowable content of food for the following 0.3mg / Kg. Routine analysis, the more use of photometry and atomic absorption method. In this paper, the appropriate conditions for the determination of mercury by potentiometric stripping (PSA) were studied. The results showed that under the conditions of pH2.83 ~ 5.02, 0.075M NaCl as medium, 3.00 × 10 ~ (-4) MKMnO_4 as oxidant and 0.04mg / l Cu (Ⅱ) as sensitizer, Method for the determination of trace mercury in fish. The result is consistent with the photometric method. Mercury in fish can also be determined by flow injection analysis using the Wall-Jet Electrochemical Detector. The results are in agreement with the above general