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Determination of cadmium, chromium and copper in high salt samples by LA-ICP-OES after electrodeposition—preliminary study

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Abstract

A novel method is presented for determination of heavy metal ions in a high-saline matrix. It is based on the electrodeposition of the ions and subsequent laser ablation coupled to inductively coupled plasma optical emission spectrometry (LA-ICP-OES). Three arrangements for electrodeposition were worked out, two of them with stationary working electrodes. Materials for use in the working electrodes, and conditions for electrodeposition of Cd, Cr and Cu (pH, deposition current, time of electrolysis) were studied. Nickel was found to be the best electrode material. The metals accumulate on the surface of electrode and were then evaporated/ablated with a Nd:YAG laser focused into the ICP-OES spectrometer. The detection limits are 0.13 mg L−1 for Cd, 0.15 mg L−1 for Cu, and 1.9 mg L−1 for Cr in case of a stationary bottom working electrode, and 0.25 mg L−1 for Cd, 0.05 mg L−1 for Cu, 0.8 mg L−1 for Cr when using a rotating electrode. The relative standard deviation is in range from 3.8 to 10.3%. Waste water was analyzed in this way by the standard addition method.

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Acknowledgement

This work was supported by project MSM 0021622412 of Ministry of Education, Youth and Sports of the Czech Republic.

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Authors and Affiliations

  1. Department of Chemistry, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic

    Jan Knápek, Josef Komárek & Karel Novotný

  2. Czech Agriculture and Food Inspection Authority, Květná 15, 603 00, Brno, Czech Republic

    Jan Knápek

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  1. Jan Knápek
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  2. Josef Komárek
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  3. Karel Novotný
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Correspondence to Jan Knápek.

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Knápek, J., Komárek, J. & Novotný, K. Determination of cadmium, chromium and copper in high salt samples by LA-ICP-OES after electrodeposition—preliminary study. Microchim Acta 171, 145–150 (2010). https://doi.org/10.1007/s00604-010-0419-9

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  • DOI: https://doi.org/10.1007/s00604-010-0419-9

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