Abstract：Analytical properties and spectra of naphthyl diphenymethane basic dyes and associated complexes of dye with [AgI2]- was studied. A new method for the spectrophotometric determination of trace amount of silver was developed. The method was based on the Victoria Pure Blue BO reacted with [AgI2]- to form blue associated complex in the buffer medium of H3PO4-NaH2PO4. The spectrophotometric measurements were directly carried out at 574 nm, the apparent molar absorptivity of associated complex was 7.25×104 L·mol-1·cm-1. The Beer’s law was obeyed in the range of 4-250 μg·L-1. The recoveries were in the range of 97.0%-98.3%. RSD was 2.7%. The method has been used to determination of trace silver in river water with satisfactory results.
施文健，徐 斐，俞 芸. 碘-碱性艳蓝BO体系分光光度法测定痕量银的研究[J]. 光谱学与光谱分析, 2005, 25(05): 765-767.
SHI Wen-jian, XU Fei, YU Yun. Study and Spectrophotometric Determination of Trace Silver with Iodide-Victoria Pure Blue BO System. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(05): 765-767.
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