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采用放射性同位素１９８Ａｕ示踪法研究了伯胺Ｎ１９２３和ＴＢＰ从碱性氰化液中萃取金（Ⅰ），考察了酸化率、水相ｐＨ值、萃取剂浓度等对萃取率的影响，以及ＮａＯＨ对载金有机相的反萃作用。结果表明，ＴＢＰ含量大于２０％，酸化的Ｎ１９２３与ＫＡｕ（ＣＮ）２摩尔比值在１：１时，金能够完全被萃取。载金有机相可采用０．ｌｍｏｌ·Ｌ－１的Ｎａ０Ｈ溶液定量反萃。机理研究表明，伯胺和ＴＢＰ萃取Ａｕ（ＣＮ）２－，符合ＢＣ类协同萃取机理。当金浓度大于１０ｇ·Ｌ－１时，在萃取有机相中形成纳米级的聚集体。
The primary amine N1923 and TBP were extracted from alkaline cyanide solution by radioisotope 198Au tracer method. The effects of acidification rate, pH value of aqueous phase and extractant concentration on extraction rate were investigated. Anti-extraction of gold-bearing organic phase. The results showed that gold could be completely extracted when the content of TBP was more than 20% and the molar ratio of acidified N1923 to KAu (CN) 2 was 1: 1. Loaded organic phase can be used 0. lmol · L-1 Na0H solution quantitative back-extraction. Mechanism studies show that primary amine and TBP extraction of Au (CN) 2-, in line with BC type co-extraction mechanism. When the gold concentration is more than 10g · L-1, nanoscale aggregates are formed in the extracted organic phase.