Original scientific paper

Voltammetric Determination of Cr(HI) and Cr(VI) in Tropical Estuarine Waters: Advantages and Limitations

Elder Magalhàes de Souza ; Departamento de Quimica, Pontifwia Universidade Católica do Rio de Janeiro, 22453-900 Rio de Janeiro, Brazil
Angela de Luca R. Wagener ; Departamento de Quimica, Pontifwia Universidade Católica do Rio de Janeiro, 22453-900 Rio de Janeiro, Brazil
Percio Farias ; Departamento de Quimica, Pontifwia Universidade Católica do Rio de Janeiro, 22453-900 Rio de Janeiro, Brazil

Abstract

The adsorptive-catalytic voltammetry of Cr(VI) and total chromium using DTPA is optimized for application to estuarine waters with high content of dissolved organic substances. The sensitivity of the method, better than 2 nA nM-1 s'1, is adequate to the intended goal of speciation. However, the instability of Cr(VT) in the presence of organic material imposes restrictions to the use of this methodology in large scale surveys and monitoring activities.

Keywords

Hrčak ID:

135619

URI

https://hrcak.srce.hr/135619

Publication date:

3.4.1997.

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