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作者用自行研制的流动注射式化学发光分析仪系统地研究了银(Ⅰ)催化鲁米诺-过硫酸钾体系的化学发光反应,确定了反应的最佳条件,研究了20余种金属离子的干扰情况。方法的线性范围为1×10~(-5)—1×10~(-8)克/毫升银(Ⅰ),时1×10~(-7)克/毫升银(Ⅰ)进行11次测定的变异系数小于4.0％。由于采用巯基棉交换柱分离干扰离子,有效地排除了大多数金属离子的干扰,为矿石中痕量银的测定提供了一个灵敏、快速、具有实际意义的分析方法。
The author studied the chemiluminescence reaction of silver (Ⅰ) catalyzed luminol-potassium persulfate system by flow injection chemiluminescence analyzer developed by ourselves, and determined the optimum reaction conditions. The effects of more than 20 kinds of metal ions Interference situation. The linear range of the method was 1 × 10 ~ (-5) -1 × 10 ~ (-8) g / ml silver (Ⅰ), and 1 × 10 ~ (-7) g / The coefficient of variation is less than 4.0%. The separation of interference ions by the thiol cotton exchange column can effectively eliminate the interference of most metal ions and provide a sensitive, rapid and practical analytical method for the determination of trace silver in ores.