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前文报导了钼-酒石酸-酸氯盐体系的催化波及其机理。鉴于酒石酸能使钼-氯酸盐体系的催化波(约为扩散电流的130倍)更为提高,达到扩散电流的400倍左右,因此曾用二十余种有机酸和其他有机化合物进行普遍试验,证明凡是α-羟基酸均有提高钼-氯酸盐体系的催化波的作用,而杏仁酸和二苯羟乙酸的效果特别优异。本文研究了杏仁酸和二苯羟乙酸存在时钼的催化波,此种带有苯环的α-羟基酸竟能使钼-氯酸盐体系的催化电流提高到为扩散电流的15000倍(4%氯酸钾)和30000倍(25%氯酸钠)左右,从而获得了特殊的高灵敏度,最低可检出6×10~(-10)M浓度的钼。是钼的现有分析方法中最灵敏的方法之一。本文对这一催化波的性质进行了初步的探索。
The foregoing reports the catalytic mechanism of the molybdenum-tartaric acid-acid chloride system. Since tartaric acid can increase the catalytic wave of molybdate-chlorate system (about 130 times of diffusion current) to about 400 times of diffusion current, it has been tested commonly with more than 20 kinds of organic acids and other organic compounds , Which proves that all α-hydroxy acids enhance the catalysis wave of the molybdenum-chlorate system, and the effects of mandelic acid and diphenylacetic acid are particularly excellent. In this paper, the catalytic wave of molybdenum in the presence of mandelic acid and diphenylacetic acid was studied. The α-hydroxy acid with benzene ring could increase the catalytic current of molybdenum-chlorate system to 15000 times of the diffusion current (4 % Potassium chlorate) and 30000 times (25% sodium chlorate), resulting in a special high sensitivity of molybdenum with a minimum detectable concentration of 6 × 10 -10 M. It is one of the most sensitive methods in molybdenum’s existing analysis methods. In this paper, the catalytic wave of the nature of a preliminary exploration.