金—钼酸盐—罗丹明B—PVA分光光度法测定痕量金的研究  

SPECTROPHOTOMETRIC DETERMINATION OF GOLD WITH MOLYBDATE AND RHODAMINE B

作　　者：李满秀 王成业 张有贤[1,2] 

机构地区：[1]山西忻州师专化学系 [2]山西大学化学系

出　　处：《山西大学学报（自然科学版）》1996年第3期297-299,共3页Journal of Shanxi University(Natural Science Edition)

摘　　要：研究了在聚乙烯醇（ＰＶＡ）存在下，金—钼酸铵配阴离子与罗丹明Ｂ离子缔合物分光光度测定痕量金的新方法。该缔合物在高氯酸介质中最大吸收波长为５７０ｎｍ，表观摩尔吸光系数ε＝１．０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，０－３μｇＡｕ／ｍｌ范围内服从比耳定律。该法灵敏度高、稳定性好，选择性和精密度均较好。本法用于矿石中金的测定。Spectrophotometric determination of gold has been studied in the presence of polyvinyl alcohol(PVA),Au(Ⅲ) reacts with ammonium molybdate and rhodamine B (RB) to form the ion assocciated complex.Its apparent molar absorptivity is 1.0×10 5L·mol -1 ·cm -1 at 570nm,Beers law is obeyed in the range of 0 to 3μg/ml for Au(Ⅲ).This method was applied to the determination of gold in some minerals.The results are satisfied.

关 键 词：金 钼酸盐 罗丹明B 分光光度法 

分 类 号：O614.123[理学—无机化学] O657.3[理学—化学]