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本文研制了以乙基紫-IO_4~-缔合物为电活性物质的PVC膜IO_4~-离子选择电极,它对IO_4~-浓度在2×10~(-0)—1×10~(-1)M间的响应符合Nernst关系式,级差为56毫伏(9—12℃),响应时间小于1分钟,适宜的pH范围为3.8—6.5,内阻为1.5×10~5 欧姆左右,电极寿命在七个月以上。还进行了电极的选择性、重现性和稳定性实验,也得到较满意结果。
In this paper, a PVC membrane IO_4 ~ - ion selective electrode with ethyl violet-IO_4 ~ - association as an electroactive substance was studied. Its effect on the concentration of IO_4 ~ - in the range of 2 × 10 ~ (-1) -1 × 10 ~ 1) The response between M is in accordance with Nernst’s relation, the step difference is 56 millivolts (9-12 ° C), the response time is less than 1 minute, the suitable pH range is 3.8-6.5, the internal resistance is about 1.5 × 10-5 ohm, Life expectancy in more than seven months. Electrode selectivity, reproducibility and stability experiments were also conducted, and satisfactory results were obtained.