火焰原子吸收光谱法快速测定金  

RAPID FAAS DETERMINATION OF GOLD

作　　者：曾念华 

机构地区：[1]成都岩矿测试中心,成都610081

出　　处：《理化检验（化学分册）》2003年第6期347-348,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：矿样经氯酸钾硝酸溶液加王水混合试剂分解 ,泡沫塑料吸附金溴络合物、硫脲溶液解脱 ,直接用火焰原子吸收光谱法测定金。Mineral samples were decomposed and dissolved with a mixed acid solution containing potassium chlorate, nitric acid and hydrochloric acid. Gold(Ⅲ) in the form of anionic complex with bromide was separated and preconcentrated by adsorption on foaming plastics, and then desorbed with thiourea solution. The gold in the desorbing solution was determined directly by FAAS. The limit of determination of this method was at the concentration level of 10 -6 μg·g -1 (mass percentage). Recoveries tested by standard addition method were in the range of 94.5%～98.8%.

关 键 词：火焰原子吸收光谱法 测定 金 氯酸钾 硝酸 王水 分解 泡沫塑料 吸附 金溴络合物 硫脲 解脱 矿样 

分 类 号：P575.4[天文地球—矿物学]