【摘要】 研究了在非离子型表面活性剂存在下铋(Ⅲ)与2-[3,5一二溴-2-吡啶偶氮]-5一二乙氨基苯酚的显色反应。在pH～2的酸性介质中,乳化剂OP能使Bi(Ⅲ)-2-[3,5一二溴-2-吡啶偶氮]-5-二乙氨基苯酚络合物增敏,其最大吸收峰位于596nm,摩尔吸光系数为1.05×10~5在乳化剂OP存在时,连续变化法和斜率比法测得络合物的组成比为Bi:R=1:2。此方法用于粗铅和铅板栅合金中Bi的测定获得满意的结果。更多还原

【Abstract】 The color reaction of bismuth (III) with 3,5-diBr-PADAP in the presence ofnon-ionic surfactant has been investigated. In a solution of pH 2 emulsifier OP increa-ses sensitivity of the complex Bi (III)-3,5-dlBr-PADAP. The color complex exhibitesmaximun absorbtion at 596 nm The molar absorptivity is 1.05×10~5. In the presenceof OP the molar ratio complex was determined to be Bi:diBr PADAP=1:2 bycontinuous variation and slope ratio methods. A spectrophotometric method for dete-rmining bithmuth in lead and lead grid alloy has been developed with satisfactoryresults更多还原