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本文试制了一种以Hg_2Cl_2为电化学活性物质的高灵敏度氯离子选择电极。该电极在溶液PH<3,〔C1~-〕=10~-1—4×10~6M范围内,电极电位与1g〔C1-〕符合线性关系,其斜率为59mv/p〔C1~-〕,线性检出下限可达4×10~-8M,比一般氯离子选择电极的灵敏度高一个数量级以上。该电极的结构简单,制造方便,响应时间快,性能也比较稳定,并具有一定的选择性。曾将实验测定的电极电位和理论计算值比较,可以认为该电极同甘汞电极的性质是相似的。
In this paper, a high sensitivity chloride ion selective electrode with Hg_2Cl_2 as the electrochemical active material was fabricated. The electrode in the solution PH <3, [C1 ~ -] = 10 ~ -1-4 × 10 ~ 6M range, the electrode potential and 1g [C1-] in line with the linear relationship, the slope of 59mv / p [C1 ~ -] , The linear detection limit of up to 4 × 10 ~ -8M, than the average sensitivity of chloride ion selective electrode an order of magnitude more. The electrode has the advantages of simple structure, convenient manufacture, fast response time, relatively stable performance and certain selectivity. The experimentally measured electrode potentials were compared with the theoretical calculations and it can be considered that the electrode has similar properties to the calomel electrode.