摘要
试样经王水分解,在5％—15％的王水介质中,用三苯基膦泡沫塑料对微量银进行分离富集。用ρ为20g/l的硫脲溶液解脱被吸附在泡沫塑料上的银。解脱液在原子吸收分光光度计上测定银量。方法的检出限为0.022×10^(-■),特征浓度为0.014μg/ml,可测定地质样品中0.0X×10^(-6)以上的银量。
The samples are decomposed by agua regia The tr(?)ce silver is seperated and concentrated in 5—15% agua regia meson with triphenyl phosphine foamed plastic.The silver absorptcd on foam is desorpted by 2 % thiourea solution.The silver content of the desoption solution is determined with atomic absorption spectrophotometcr.The detection limit and special density by this method are 0.022×l0^(-6) and 0.0l4μg/ml respectively.The silver content over 0.0X×10^(-8) in samples can be determined.
关键词
微量银
泡沫塑料
原子吸收
测定
Trace silver
Triphenyl phosphine
Foamed plastic
Atomic absorption
