研究论文
陶澍,胡海瑛.阳极溶出法测定游离态金属过程中金属配合物解离动力学的计算机模拟[J].环境科学学报,1999,19(6):595-590
阳极溶出法测定游离态金属过程中金属配合物解离动力学的计算机模拟
- Computer simulation of metal complex dissociation during free metal determination using anodic stripping voltam metry
- 基金项目：国家杰出青年基金[49525102]
- 作者
- 单位
- 陶澍
- 北京大学城市与环境学系,北京 100871
- 胡海瑛
- 北京大学城市与环境学系,北京 100871
- 摘要：用计算机模拟了阳极溶出伏安法预电解过程中滞膜层中游离金属离子、游离配位体和配合物的转化及迁移过程。模拟结果证实,发生在滞膜层中的络和物解离过程是造成金属富集通量偏高的根本原因。测定偏差的大小与配合物解离常数、配位体浓度、物质迁移速率常数以及预电解时间等参数有关。利用EDTA铜体系进行测定的结果验证了上述结论.
- Abstract：The processes of transformation and masstransfer occurringin stagnantfilm during deposition period of ASV measurementfor free metals were simulated using computer.The results revealed that the dissociation of metal complexin the stagnant film isthe primary reason causing the overestimation offree metalconcentration using ASV technique. The influences of a number of parameters on the magnitude of the overestimation error wereinvestigated. The computer simulated results were supported by experimen tal data.
- Key words：ASV free metal computersimulation stagnantfilm
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