【摘要】 地质样品经王水分解后,在一定浓度的王水和盐酸介质中,以磷酸三丁酯三苯基膦醋酸纤维富集金银,用20g/L硫脲溶液解脱,采用等离子体发射光谱法测定,金、银的回收率为98%~101%,方法检出限金为0.001μg/g,银为0.001μg/g。更多还原

【Abstract】 In this paper a method for separation and preconcentration of trace gold and silver in geological samples with tributyl phosphate (TBP) triphenyl phosphine (TPP) acetic cellulose is developed. The sample was digested with aqua regia and Au and Ag in the sample solution were preconcentrated with tributyl phosphate triphenyl phosphine acetic cellulose in medium of aqua regia-HCl. After eluting with thiourea solution (20 g/L), Au and Ag were determined by inductively coupled plamas-atomic emission spectrometry(ICP-AES). Detection limits of the method are 0.001 μg/g with recovery of 98%~101% for both Au and Ag.更多还原