论文部分内容阅读
水中硫化物的测定常采用碘量法和分光光度法,前者准确度高,但不能用于硫化物含量较低的情况,而后者干扰离子较多,亦不能应用于混浊和有色的水样。用阴极溶出伏安法测定微量S~(2-)离子是测定硫化物的灵敏方法,但方法中主要使用与汞有关的工作电极,Kunio Shimizu等人利用差分脉冲极谱法研究了在旋转圆盘银电极上硫化银膜的沉积和溶解行为,以及对硫的溶出蜂电流和电压的影响因素,认为此种电极特别适用于超微量硫离子的测定,但测定时必须用氩气除氧和气体保护。
The determination of sulfide in water often use iodometry and spectrophotometry, the former high accuracy, but can not be used in the case of lower sulfide content, while the latter more interference ions can not be applied to cloudy and colored water samples. Cathodic stripping voltammetry for the determination of S ~ (2-) ions is a sensitive method for the determination of sulfides. However, the method mainly uses the mercury-related working electrode. Kunio Shimizu et al. Studied differential pulse polarography Silver electrode silver plate electrodeposition and dissolution behavior, as well as on sulfur elution bee current and voltage factors, that this electrode is particularly suitable for the determination of ultra-trace sulfur ions, but the determination of oxygen must be used to oxygen and Gas protection.