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本文报告一个痕量金的诱导光度测定新体系:在HCl-HNO_3介质中有尿素存在时,痕量金诱导H_2PO_2~--Te(Ⅳ)的氧化还原反应;利用乳化剂OP提高反应的灵敏度和泡沫塑料吸附金以分离除去伴生元素,测定地质样品中>0.2ppb Au。
This paper reports a new system for the determination of trace amounts of gold by inducing photometry: trace-gold induces the redox reaction of H 2 PO 2 --Te (Ⅳ) in the presence of urea in HCl-HNO 3 media; the use of emulsifier OP improves the sensitivity and Foam adsorbed gold to separate and remove associated elements, determination of geological samples> 0.2ppb Au.