Análise de especiação de cobre e zinco empregando voltametria de redissolução anódica com pulso diferencial

Química Nova

Alessandra Emanuele Tonietto¹  Marco Tadeu Grassi¹ 

[1] ,Universidade Federal do Paraná Departamento de Química Curitiba PR ,Brasil

关键词: anodic stripping voltammetry;    speciation;    trace metal;   

DOI  :  10.1590/S0100-40422012000100029

来源: SciELO

【 摘 要 】

This work describes methodologies for speciation analysis of the metals copper and zinc as total, total dissolved, labile, as well as complexation capacity (conditional stability constants and available ligand concentration), using the same technique, differential pulse anodic stripping voltammetry (DPASV). Several supporting electrolytes were tested, and the results showed that KNO3 and HNO3 resulted in voltamograms without interferences as well as excellent resolution for the total and labile fractions. The methodology using the DPASV technique allows a simple and low cost analysis of copper and zinc speciation, with high precision and sensitivity, with limits of quantification (LOQ) of 1.8 nmol L-1 for copper and 2.1 nmol L-1 for zinc.

【 授权许可】

CC BY-NC   
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