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Thermal Lens Spectrometric Determination of Colloidal and Ionic Silver in Water

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Abstract

Collinear dual beam thermal lens spectrometric (TLS) detection, combined with flow injection analysis (FIA), was developed and applied to determine simultaneously concentrations of ionic and colloidal silver in the Russian drinking water supplies of the International Space Station (ISS). The newly developed method is based on on-line generation of silver colloids by sodium borohydride (NaBH4). The generated silver nanoparticles exhibit an absorption maximum close to 400 nm, which enables their excitation with a 407 nm line of a Kr laser offering a very sensitive TLS detection scheme with impressive limits of detection (LOD) of 1.5μg · L−1. Ionic and colloidal silver present initially in the sample can be discriminated by performing the measurements with and without NaBH4.

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Authors and Affiliations

  1. Laboratory of Environmental Research, University of Nova Gorica, Vipavska 13, 5000, Nova Gorica, Slovenia

    Dorota Korte & Mladen Franko

  2. Department of Analytical Chemistry, University of Torino, Via Pietro Giuria 5, 10125, Turin, Italy

    Maria Concetta Bruzzoniti & Corrado Sarzanini

Authors
  1. Dorota Korte
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  2. Maria Concetta Bruzzoniti
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  3. Corrado Sarzanini
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  4. Mladen Franko
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Correspondence to Mladen Franko.

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Korte, D., Concetta Bruzzoniti, M., Sarzanini, C. et al. Thermal Lens Spectrometric Determination of Colloidal and Ionic Silver in Water. Int J Thermophys 32, 818–827 (2011). https://doi.org/10.1007/s10765-010-0856-z

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  • DOI: https://doi.org/10.1007/s10765-010-0856-z

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