P_（350）萃取分离火焰原子吸收光度法测定微量金  

DETERMINATION OF TRACE GOLD BY FLAME ATOMIC ABSORPTION SPECTROPHOTOMETRY AFTER ITS SEPARATION AND PRECONCEN-TRATION WITH P350

作　　者：邹爱兰[1] 

机构地区：[1]中南工业大学矿物工程系

出　　处：《中南工业大学学报》1995年第4期475-487,共13页Journal of Central South University of Technology(Natural Science)

摘　　要：要Ｐ３５０是一种新型的贵金属萃取剂，在盐酸介质中，当盐酸浓度高时，能选择性地萃取金；当盐酸浓度低时能反相萃取金。利用Ｐ３５０这个特点，使金从其基体中分离出来并得到富集。在原子吸收光度计上，作者确定了Ａｕ的最佳测定条件和最佳萃取条件，成功地测定了含金量为０．５～４０ｇ／ｔ的处银（铜）等样品。其结果与传统的泡沫塑料富集－硫脲解脱原子吸收法测定结果一致，本法萃取效果好，测定速度快，操作简便。P350 is a new～type noble metal extranctant.In hydrochloric acidmedium,P350 can extractgold selectively in strong acid and anti-extract gold in weak acid.Based on this characteris-tic,the gold is separated from its matrixes and enriched.Optimization of analytical and ex-tractical condition of gold is studied out on atomic absorption spectrophotometer.Themethod is successfully applied to some pure silver(copper)samples in which the content ofgold ranges from 0.5～40g/t.The result by this method agreed well with the result of thetraditional polyurthane foam enrlchrrient n1ethod.This method has good extraction effect andquick speed of determination,and it is simpie to operate.

关 键 词：金 萃取 比色法 磷同位素 

分 类 号：O614.123[理学—无机化学]