【摘要】 本文报道了以TritonX100为增溶剂，过硫酸钾氧化维多利亚蓝催化光度法测定痕量银的新体系。方法的检出限为8．5×10－4mg／L；相对标准偏差为2．1％（n＝9）；线性范围为0.002～0.010mg／L、0．010～0．080mg／L。可用于测定黑白照相纸中的银和氯化银的溶度积。更多还原

【Abstract】 A new catalytic spectrophotometric method for the determination of trace amount of Ag has been developed. The method is based on the catalytic effect of Ag(Ⅰ) on the oxi dation of victoria blue with potassium persulfate in the presence of Triton X-100 as a solubi lizing agent. The effect of the solution pH, the reagent concentration and interfering ions on reaction rate has been studied. The linear range of determinatiQn for silver is 0. 002～0.010 mg/L and 0.010～0.080 mg/L. The detection limit is 8. 5× 10-4mg/L and the relative stan dard deviation is 2. 1%. The method has been used to deterpoine trace silver in photographic paper samples and the solubility product of silver chloride.更多还原