Measurement of Cr(III)/Cr(VI) species by wavelength modulation diode laser flame atomic absorption spectrometry |
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| Affiliation: | 1. Institute of Astronomy, Kharkov V.N. Karazin National University, Kharkov 61022, Ukraine;2. School of Natural Sciences, Far Eastern Federal University, Vladivostok 690950 Russia;3. Space Science Institute, 4750 Walnut St. Suite 205, Boulder, CO 80301, USA;1. Centre de Recherches Pétrographiques et Géochimiques, CNRS/Université de Lorraine, Vandoeuvre-lès-Nancy, France;2. University of Maryland, College Park, MD, USA;3. Crimean Astrophysical Observatory of Russian Academy of Science, Crimea;4. Space Science Institute, Boulder, CO, USA |
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| Abstract: | High-performance flow atomic spectrometry of Cr(III) and Cr(VI) species by high-performance liquid chromatography (HPLC) separation, hydraulic high-pressure nebulization (HHPN) for sample introduction and wavelength modulation-laser atomic absorption spectrometry (WM-LAAS) with diode lasers in an analytical flame is reported. 3σ detection limits of 0.5 and 1 ng ml−1 have been obtained for Cr(VI) in deionized and drinking water, respectively. Due to relatively high blank levels, the corresponding detection limits of Cr(III) are higher than for Cr(VI), i.e. 1.6 ng ml−1 in deionized water and 5 ng ml−1 in drinking water. |
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