【摘要】 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。更多还原

【Abstract】 The chemiluminescence system Luminol-K₂ S₂O₈-Ag（Ⅰ）-triethylenetetramine （TETA） has been studied. Thereby a new method for thedetermination of trace silver has been developed using chemiluminescence reaction and flow injection analysis system. The factors affecting chemiluminescence signal are discussed. The optimum concentrations of the reagents are found to be 7.5×10^-2mol/L Luminol, 4×10^-2mol/L K₂S₂O₈ and 0.02％TETA The chemiluminescence emission are produced in alkaline medium of pH13. The calibration curve is rectilinear in the range 1×10^-8to 1×10^-5g/mL Ag（Ⅰ） and the RSD is less than 4％ for 11 determination of 1×10^-7g/mL Ag （Ⅰ）. The behaviour of more than 20 foreign ions has been examined and only Mg²⁺, Cd²⁺, Co²⁺- Mn²⁺ are considered to interfere seriously. The method has been applied to the determination of Ag（Ⅰ） in ores after separating Ag （Ⅰ） using sulfhydrylated cotton fiber and the results are satisfactory.更多还原