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- W1979849113 abstract "Abstract A simple method for extraction electrothermal atomic absorption spectroscopy (ETAAS) determination of Tl in wine is described. The wine sample is decomposed with a mixture of nitric acid and hydrogen peroxide and both thallium species Tl(I) and Tl(III) are extracted from 0.5 mol l−1 KI solution into iso-butyl methyl ketone (IBMK). Optimal parameters for ETAAS measurement of the iodide complexes extracted were defined for two different instruments: Perkin Elmer Zeeman 3030 (HGA 600) and Varian SpectrAA-880 (GTA-100). Modifiers of tartaric acid, Pd [ammoniumtetrachloropaladate (II)] or Ag (silver nitrate) were investigated for thermal stabilization of such extremely volatile species as iodide complexes of Tl. The analytical procedure developed permits 50-fold preconcentration and determination of 0.05 μg l−1 Tl in wine. The relative standard deviation ranges from 6 to 12% for the concentration range 0.2–1 μg l−1 Tl in wine." @default.
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- W1979849113 date "2002-06-01" @default.
- W1979849113 modified "2023-10-06" @default.
- W1979849113 title "Determination of thallium in wine by electrothermal atomic absorption spectrometry after extraction preconcentration" @default.
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- W1979849113 doi "https://doi.org/10.1016/s0584-8547(02)00032-0" @default.
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