痕量银的催化光度法测定  

Catalytic Spectrophotometrie Determination of Trace Silver

作　　者：朱化雨 彭安顺 吴则才 

机构地区：[1]山东临沂师专化学系,临沂276005 [2]山东师范大学化学系,济南250014

出　　处：《分析试验室》1992年第4期31-32,共2页Chinese Journal of Analysis Laboratory

摘　　要：本文利用α,α′-联吡啶作活化剂,在HAc-NaAc介质中,银能催化铈(Ⅳ)氧化氯化物的反应,以茜素氨羧络合剂(ALC)及氟离子为显色剂监测指示反应中生成的铈(Ⅲ),建立了痕量银的催化光度法测定的新方法。本法的检出银量为5×10^(-5)μg/mL,线性范围为0～0.1μg/25mL,用于矿物标准样品分析,结果令人满意。Based on the catalytic effect of Ag on the oxidation of chloride with Ce(Ⅳ) in the presence of α, α'-dipyridyl in HAc-NaAc buffer solution and monitoring the production of Ce (Ⅲ) with alizarin-3-methylamine-N, N-diacetic acid and fluoride as the chromogenic reagent, a new spectrophotometric method for determining trace amounts of Ag has been developed. The limit of detection is 5×10^(-5)μg/mL Ag. The linear range is obtained of 0～0.1βg/25mL of Ag. The method has been used to determine trace Ag in ores with satisfactory results.

关 键 词：催化光度法 银 氟离子 茜素络合剂 

分 类 号：O614.122[理学—无机化学]