Low cost methods to purify low grade reagents and to control contamination for trace metal determination in natural waters.

被引：25

作者：

Campos, MLAM ^{[1
]}

Bendo, A ^{[1
]}

Viel, FC ^{[1
]}

机构：

[1] Univ Fed Santa Catarina, Dept Quim, BR-88040900 Florianopolis, SC, Brazil

来源：

QUIMICA NOVA | 2002年 / 25卷 / 05期

关键词：

copper; speciation; cathodic stripping voltammetry;

D O I：

10.1590/S0100-40422002000500017

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Probably one of the most difficult and challenging aspects of measuring trace metals in natural waters is to avoid contamination during sampling, manipulation and analysis. This work discusses how to avoid contamination using simple procedures, and considers alternative methods to purify deionised water and low grade reagents to enable accurate determination of trace metals in natural waters in a common laboratory. Measurements were performed by cathodic stripping voltammetry and copper was used as a model metal to test the procedures. It was possible to evaluate copper speciation in natural waters even when total dissolved copper concentration was as low as 1.5 nmol L-1. The methods' accuracy was confirmed by analysis of certified seawater.

引用

页码：808 / 813

页数：6

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