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在5%盐酸介质中,用抗坏血酸还原铁,以碘化物的形式用MIBK萃取Ag、Pb、Cd,原子吸收法测定有机相中Ag、Pb、Cd的含量。本方法能满足化探扫面样品的灵敏度和精密度的要求。一、实验部分(一)试剂和仪器混合标准溶液(5%NH_4Cl-0.5摩尔/升
The content of Ag, Pb and Cd in the organic phase was determined by atomic absorption spectrometry with 5% hydrochloric acid as the reducing iron by ascorbic acid and MIBK as the iodide. The method can meet the requirements of the sensitivity and precision of the geochemical scanning surface samples. First, the experimental part (a) reagents and equipment mixed standard solution (5% NH 4 Cl-0.5 mol / l