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用新合成含硫三乙烯四胺型螯合树脂填充微型吸附柱,建立了螯合树脂微柱分离富集—火焰原子吸收光谱法测定地质样品中痕量银的方法。研究了螯合树脂微柱的吸附性能及影响吸附的因素,用酸性硫脲作洗脱剂,以峰面积检测,测定Ag(I)的线性范围为0.02～1.0μg/mL,相对标准偏差为2.3%(n=3),检出限为0.005μg/mL,灵敏度提高20倍,螯合树脂微柱可重复利用。用于地质样品中痕量银的测定,结果满意。
A new synthesis of sulfur-containing triethylenetetraamine chelating resin filled micro-adsorption column, the establishment of chelating resin micro column separation and enrichment - flame atomic absorption spectrometry method for the determination of trace silver in geological samples. The adsorption properties of the chelating resin microcapsules and the factors that affect the adsorption were studied. The linear range of Ag (I) was 0.02 ~ 1.0μg / mL with acidic thiourea as eluent and the relative standard deviation was 2.3% (n = 3), the detection limit of 0.005μg / mL, the sensitivity increased by 20 times, chelate resin micropillars can be reused. For the determination of trace silver in geological samples, the results are satisfactory.