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应用均匀膜电极直接测定溶液中 Hg~(2+)已有一些报导。电极测定 Hg~(2+)的直接电位法均存在如下缺点:常见的离子如 Cl~-、Br~-、SCN~-等干扰 Hg~(2+)的直接测定,致使方法无多大实用价值;此外,电极响应的 Nernst 线性关系不佳,(这是由于二价汞常以各种络阴离子的形式存在于溶液中之故)。流动载体电极测定 Hg~(2+)也有一些报告,其缺点是检测限一般只能到10~(-4)M 或10~(-5)M Hg~(2+)的数量级。
The direct determination of Hg 2+ in solution by using uniform membrane electrode has been reported. Electrode determination of Hg2 + direct potential method has the following disadvantages: Common ions such as Cl ~ -, Br ~ -, SCN ~ - interfere with the direct determination of Hg ~ (2+), resulting in the method of little practical value In addition, the Nernst linearity of the electrode response is poor (this is due to the fact that divalent mercury is often present in solution in the form of various complex anions). However, there are some reports about the determination of Hg 2+ by flow cytometry. The disadvantage is that the detection limit can only be in the order of 10 -4 M or 10 -5 M Hg 2+.