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单池示差反向极谱,系在一个电解池中放置二支汞薄膜电极,一支预电解,一支不预电解,作示差反向扫描时,两极之电容电流抵消,而前一电极上之金属氧化峰电流没有抵消,可以测定。电极用长2厘米,φ1.6毫米之银丝直接涂汞。电解液25毫升。预电解3分钟,可定量2×10~(-10)MPb~(2+),相对误差<10—15％。检出量可达10~(-11)M。方法设计合理,灵敏度高,精确度好,操作简捷,系一实用的超微量元素分析方法。
Single cell differential reverse polarography, the Department placed in an electrolytic cell two mercury thin film electrode, a pre-electrolysis, a non-pre-electrolysis, differential display for differential scanning, the two poles of the capacitor current offset, while the previous electrode The metal oxide peak current is not offset, can be measured. Electrode with a length of 2 cm, φ1.6 mm of silver directly coated mercury. Electrolyte 25 ml. Pre-electrolysis 3 minutes, can be quantitative 2 × 10 ~ (-10) MPb ~ (2 +), the relative error of <10-15%. Detection of up to 10 ~ (-11) M. The method has the advantages of reasonable design, high sensitivity, good accuracy and simple operation, and is a practical ultra-trace element analysis method.