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汞的极谱法测定已有报道,但需加入除氧剂消除氧的影响,而加入除氧剂后要扣除空白,使测量波高复杂化。为此本文对底液及测定条件重新作了选择。经试验发现,在0.68mol/L氢氧化钾-1.00mol/L碘化钾-6％无水亚硫酸钠-0.02％动物胶溶液中,波形良好,波高与浓度关系的线性范围为0.5—100毫克/25毫升。一、仪器与主要试剂 883型笔录式极谱仪,滴汞电极为阴极,铂电极(铂90％,铑10％)为阳极。
Polarographic determination of mercury has been reported, but need to add oxygen scavenger to eliminate the impact of oxygen, and after adding oxygen scavenger blank to be deducted, so that the measurement of wave height complex. In this paper, the bottom liquid and measurement conditions have been re-selected. The test found that in the 0.68mol / L potassium hydroxide -1.00mol / L potassium iodide - 6% anhydrous sodium sulfite - 0.02% animal glue solution, good waveform, wave height and concentration of the linear relationship between the range of 0.5-100 mg / 25 ml . First, the instrument and the main reagent 883 record-type polarography, mercury drop electrode for the cathode, platinum electrode (platinum 90%, rhodium 10%) for the anode.