王水分解泡塑吸附原子吸收分光光度法测定金  

DETERMINATION OF GOLD BY AQUA REGIA DECOMPOSITION FOAM ADSORPTION ATOMIC ABSORPTION SPECTROPHOTOMETRY

作　　者：黄富平 陈梅蓉 阿东华 周林 HUANG Fu-ping;CHEN Mei-rong;A Dong-hua;ZHOU Lin(Southern Yunnan Testing Institute,Central Laboratory of Yunnan Exploration and Development Bureau of Geology and Mineral Resources,Pu er 665000)

机构地区：[1]云南省地质矿产勘查开发局中心实验室滇南测试所,云南普洱665000

出　　处：《云南地质》2023年第4期537-541,共5页Yunnan Geology

摘　　要：基于原子吸收分光光度法测定矿石中金含量,试样经高温焙烧后,用王水溶解,泡塑吸附,可以有效地分离和富集矿石样品中的金,大大降低共存因素,从而不影响金的测定,排除共存元素的影响,提高测试方法的灵敏度。硅酸盐中包裹金,试验结果偏低,可适量掺入氟化钠使硅的晶格处于开放状态,然后将金溶解在王水中,排除全部干扰因素。The gold content in ores were determined byusing atomic absorption spectrophotometry.After high-temperature calcination,the sampleswere dissolved in aqua regia and adsorbed by foam plastic,which helps to effectively separate and enrich gold in the ore samples and greatly reduce coexisting factors,thereby not affecting gold determinationand eliminating the influence of coexisting elements,improving the sensitivity of the testing method.When gold is encapsulated in silicates,the test results are relatively low,and an appropriate amount of sodium fluoride can be added in to keep the lattice of silicon in an open state,and then the gold can be dissolved in aqua regia to eliminate all interfering factors.

关 键 词：王水 定容稀释 泡塑 硫脲火焰原子吸收 金测定 云南普洱 

分 类 号：O657.31[理学—分析化学]