【摘要】 研究了巯基活性炭在盐酸介质中对金、铂、钯和铊的吸附能力。该法具有吸附速度快、吸附容量大、在一定条件下,普通金属不被吸附的特点,可用于分离富集各类矿物中微量贵金属。吸附后巯基活性炭低温灰化,与缓冲剂混合发射光谱法同时测定金、铂、钯和铊,选择锆作内标线,直接压样于杯形的石墨电极中,该方法简便、快速、准确。对测定条件、干扰因素进行了研究,从而建立测定金、铂、钯和铊的新方法。金、铂、钯和铊的分析线分别为312.3nm,306.5nm,311.4nm和313.1nm,内标线选择为310.7nm的锆,金、铂、钯和铊的线性范围(原子百分数)分别为0-0.20%,0-0.40%,0-0.20%和0-0.40%。金、铂、钯和铊的检测限分别0.01%,0.003%,0.003%和0.001%。用于样品的测定获得满意结果。更多还原

【Abstract】 The trace amount of gold, platinum, palladiumm and thallium in hydrochloric acid solution can be concentrated by sulfhydryl group carbon powder. The new reagent has a rapid adsorption rate and big concentrating capacity. Au(Ⅲ), Pt(Ⅱ), Pd(Ⅱ) and Tl(Ⅲ) in hydrochloric acid medium can be adsorbed on the sulfhydryl group carbon powder and filter paper to enrich and separate from many other base metals. The sulfhydryl group carbon powder is made to carbonize at low temperature, and used to determine the trace Au(Ⅲ), Pt(Ⅱ), Pd(Ⅱ) and Tl(Ⅲ) in sample by using carbon powder and strontium carbonate as buffer for atomic emission spectrometry (ASE). Zirconium is selected as intra standard line. The sample was directly loaded into ordinary electrode. The method is simple, rapid and accurate. The determination requirements and influence factors have been studied. A new method has been developed for the determination of gold, platinum, palladiumm and thallium. The analysis line of Au, Pt, Pd and Tl is 312.3 nm, 306.5 nm, 311.4 nm and 313.1 nm, respectively. For the Zr intra standard line is 310.7 nm, the linear range of Au, Pt, Pd and Tl are 0-0.20%, 0-0.40%, 0-0.20% and 0-0.40%, respectively. The detection limit of Au, Pt, Pd and Tl are 0.010%, 0.003 0%, 0.003 0% and 0.001 0%, respectively. The method has been applied to the determination of Au, Pt, Pd and Tl with satisfactory results.更多还原