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Modification of a Reaction Vessel for the Determination of Total Mercury in Hair by Cold Vapor Atomic Absorption Spectrometry

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Abstract

A classical cold vapor atomic absorption spectrometric (CVAAS) method for the determination of total mercury in blood has been previously adapted for application to samples of human hair. The reaction vessel specified in the original adaptation was, however, large and difficult to use with small hair samples. In the present study, the reaction vessel has been modified and reduced in size and the protocols have been optimized in order to provide an analytical method that is more efficient, less time-consuming, and gives lower blank values than the original adaptation. The optimized method was validated by multiple, independent, replicated assays of certified reference hair samples, and the mean recovery obtained (98.7%) indicated an efficient performance of the digestion and detection processes. The method was applied to the assay of 144 hair samples derived from populations that had or had not been exposed to mercury from environmental sources. The results from all of the samples analyzed were consistent with those published previously for similar samples.

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Acknowledgements

The authors would like to thank the CNPq and the GTZ-PPTAL foundation of the Universidade de Brasília for the financial support of this project.

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  1. Laboratório de Química Analítica e Ambiental, Universidade de Brasília, Brasília, DF, 70919-970, Brazil

    Eduardo F. Pereira & Jurandir Rodrigues SouzaDe

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  1. Eduardo F. Pereira
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  2. Jurandir Rodrigues SouzaDe
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Correspondence to Jurandir Rodrigues SouzaDe.

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Pereira, E.F., SouzaDe, J.R. Modification of a Reaction Vessel for the Determination of Total Mercury in Hair by Cold Vapor Atomic Absorption Spectrometry. Biol Trace Elem Res 130, 210–217 (2009). https://doi.org/10.1007/s12011-009-8332-y

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  • DOI: https://doi.org/10.1007/s12011-009-8332-y

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