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提出了在聚乙烯醇存在下,以Ag~+-碘化物-氯化亚锡-孔雀石绿(MG)高灵敏显色体系测定银的新方法。摩尔吸光系数为2.7×(10~6L·mol~(-1)·cm~(-1)。银含量在0.03~1.6μg·25mL~(-1)范围内服从比尔定律。用于自来水和碳酸锂样中银的分析,结果令人满意。
A new method for the determination of silver in Ag + + Iodide-Stannous Chloride-Malachite Green (MG) system was proposed in the presence of polyvinyl alcohol. The molar extinction coefficient was 2.7 × 10 ~ 6L · mol -1 · cm -1 .The Beer’s law was obeyed in the range of 0.03 ~ 1.6μg · 25mL -1 for tap water and carbonic acid Li-like silver analysis, the results are satisfactory.