流动注射－吐温80─KOH化学发光新体系测定痕量金的研究

Study on determination of trace gold by using flow injection-Tween 80-KOH new chemiluminescent system

在碱性介质中，吐温８０－ＡｕＣｌ不需外加任何氧化剂就可产生较强的化学发光。在选定的最佳条件下，建立了吐温８０－ＫＯＨ体系测定痕量金的新化学发光分析法。流动注射进样法简单、方便。检测限为５．０×１０（－９）ｇ／ｍＬ；线性范围为１．０×１０（－８）～１．０×１０（－５）ｇ／ｍＬ。常见离子中Ｉｒ（Ⅳ）和Ｏｓ（Ⅳ）对金的测定有干扰。用于化探样品分析，结果令人满意。

Compounds of Tween group can produce chemiluminescence without the addition of oxidant in a basic medium. A new highly sensitive chemiluminescent method for the determination of trace amounts of gold is established. The detection limit is 5.0×10￣(-9)g/mL for gold, with a linear range of 1.0 × 10￣(-8)-1.0 × 10￣(-5)g/mL, and relative standard deviation of 1.8% for 1.0 × 10￣(-7)g/mL An(Ⅲ) solution. This method has been used to analyze some geological samples with satisfactory results.