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本法选用汞膜电极为指示电极,银棒电极为参比电极,交流电压为4伏,直流电压为3伏,在室温的条件下看示波图切口的出现确定终点,根据消耗锌标准溶液的体积计算含量.本法和二甲酚橙容量滴定法比较,尽管不一定快速和准确,但溶液中有机物和杂质的颜色对测定没有影响,不须要用活性碳脱色或过滤.
This method selects mercury electrode as indicator electrode, silver rod electrode as reference electrode, AC voltage of 4 volts, DC voltage of 3 volts, at room temperature to see the oscilloscope cut appears to determine the endpoint, according to the consumption of zinc standard solution Volumetric calculation of content.This method and xylenol orange volumetric titration comparison, although not necessarily fast and accurate, but the solution of organic matter and impurity color has no effect on the determination, no need to use activated carbon to decolorize or filter.