碘-碱性艳蓝BO体系分光光度法测定痕量银的研究  

Study and Spectrophotometric Determination of Trace Silver with Iodide-Victoria Pure Blue BO System

作　　者：施文健[1] 徐斐[1] 俞芸[1] 

机构地区：[1]上海理工大学城建学院,上海200093

出　　处：《光谱学与光谱分析》2005年第5期765-767,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(50176032);上海市高等学校科学技术发展基金(04EB08)项目资助

摘　　要：研究了萘基二苯甲烷染料和染料与[AgI2]-缔合物光谱和分析性能。提出了一种基于在H3PO4～NaH2PO4缓冲溶液中碱性艳蓝BO与[AgI2]-反应生成蓝色缔合物,采用分光光度法测定痕量银。其最大吸收波长为574nm,表观摩尔吸光系数7.25×104L·mol-1·cm-1,线性范围4～250μg·L-1,回收率97.0%～98.3%,相对标准偏差2.7%。此方法可应用于水体中痕量银的测定。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 mn, the apparent molar absorptivity of associated complex was 7.25 X 10(4) L center dot mol(-1) center dot cm(-1). The Beer's law was obeyed in the range of 4-250 mu g center dot 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.

关 键 词：萘基二苯甲烷染料 银 分光光度法 

分 类 号：O657.3[理学—分析化学]