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Flow injection determination of total chromium in urine of occupationally exposed workers

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Abstract.

An efficient and fast method has been developed to determine chromium in urine. It is based on an on-line ultrasound-assisted sample digestion procedure exploiting the stopped-flow mode, followed by flow injection chromium preconcentration using a minicolumn filled with a commercially available chelating resin (Chelite Che). The precision as repeatability (expressed as relative standard deviation, n = 11) was 1.4% at a 10 µg L−1 level. The recovery, based on analysis of spiked samples and solutions including urine matrix components, is quantitative. The detection limit was 0.5 µg L−1 when flame atomic absorption spectrometry was employed. The preconcentration factor is 42.6. The method was applied to the determination of chromium in urine of workers exposed to welding fumes.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, Santiago de Compostela, Spain

    Rosa María Cespón & María Carmen Yebra

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  1. Rosa María Cespón
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  2. María Carmen Yebra
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Correspondence to María Carmen Yebra.

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Correspondence: María Carmen Yebra, Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, SP-15782-Santiago de Compostela, Spain

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Cespón, R., Yebra, M. Flow injection determination of total chromium in urine of occupationally exposed workers. Microchim Acta 164, 225–229 (2009). https://doi.org/10.1007/s00604-007-0916-7

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  • DOI: https://doi.org/10.1007/s00604-007-0916-7

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