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常规极谱分析中,常用明胶作极大抑制剂,但是用量对极谱波高有影响,这已为人们所知悉。然而,明胶还有些往往不为人们所注意的特殊性质,使用时若不加注意会影响分析结果的准确度。笔者在示波极谱仪上用乙酸-乙酸钠底液测定铅时发现,尽管分析体系中最终明胶浓度是一致的,但若以不同浓度的明胶溶液加入,则对极谱波高也有影响,并且明胶溶液的浓度越低时其波高偏低越明显。此外,若以等量同
Conventional polarographic analysis, commonly used gelatin as a great inhibitor, but the amount of polarography has an impact on the height, which is known to all. However, there are some special properties of gelatin that are often not noticed. If not used, the accuracy of the results will be affected. When I measured lead in acetic acid-sodium acetate at the oscillopolarographic apparatus, I found that although the final gelatin concentration in the analytical system was consistent, adding different concentrations of gelatin solution also had an impact on the polarographic wave height, and The lower the concentration of gelatin solution, the lower the wave height is. In addition, if the same amount of the same