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本文报告本实验室试制的HDS—1及HDS—2型硫离子选择性电极的分析性能测试结果。银及硫离子的实际可测下限均约为10~(-5)M。加入抗坏血酸可使低浓度硫化物溶液稳定。拟定了用电极法测定溶液中硫化物的操作步骤,绝大部分常见阴离子对测定无显著影响。
This article reports the laboratory test results of HDS-1 and HDS-2 Sulfide selective electrodes. The actual measurable lower limit of silver and sulfide ions are about 10 ~ (-5) M. Addition of ascorbic acid stabilizes the low-concentration sulfide solution. Developed by the electrode method for the determination of sulfide in solution steps, the vast majority of common anions had no significant effect on the determination.