Computer simulation of metal complex dissociation during free metal   determination using anodic stripping voltammetry

doi:10.1016/S0097-8485(98)00015-1

CORC > 北京大学 > 城市与环境学院

	Computer simulation of metal complex dissociation during free metal determination using anodic stripping voltammetry
	Tao, S ; Lam, KC ; Cao, J ; Li, BG
刊名	computers chemistry
	1999
关键词	ASV free metal computer simulation diffusion layer complexation capacity SPECIATION CAPACITY TOXICITY COPPER
DOI	10.1016/S0097-8485(98)00015-1
英文摘要	As a most widely used technique, anodic stripping voltammetry often provides overestimated results of free metal concentration or underestimated values of complexation capacity. A conceptual mode was proposed suggesting that the dissociation of the metal complex occurring in the diffusion layer close to the electrode surface during the deposition period contributes to the measurement error. A computer program was coded to simulate the transformation and mass transfer of metal ions, free ligands, and metal-ligand complexes in the diffusion layer. It was confirmed that the dissociation of the complexes within the diffusion layer causes the overestimation error for free metal determination using the anodic stripping voltammetry technique. The magnitude of the overestimation depends on the complex dissociation coefficient, concentration of the ligand, and transfer rate constant of the free metals. The results of the computer simulation were partially confirmed by experimental data based on a Cu-EDTA system. (C) 1999 Elsevier Science Ltd. All rights reserved.; Chemistry, Multidisciplinary; Computer Science, Interdisciplinary Applications; SCI(E); EI; 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 2; 1; 61-68; 23
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/160922]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Tao, S,Lam, KC,Cao, J,et al. Computer simulation of metal complex dissociation during free metal determination using anodic stripping voltammetry[J]. computers chemistry,1999.
APA	Tao, S,Lam, KC,Cao, J,&Li, BG.(1999).Computer simulation of metal complex dissociation during free metal determination using anodic stripping voltammetry.computers chemistry.
MLA	Tao, S,et al."Computer simulation of metal complex dissociation during free metal determination using anodic stripping voltammetry".computers chemistry (1999).