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  • Title: Elimination of matrix effects in electrothermal atomic absorption spectrophotometric determinations of bismuth in serum and urine.
    Author: Dean S, Tscherwonyi PJ, Riley WJ.
    Journal: Clin Chem; 1992 Jan; 38(1):119-22. PubMed ID: 1733583.
    Abstract:
    A sensitive and precise electrothermal atomic absorption spectrophotometric method for determining bismuth concentration is described. Protein precipitation and the use of a palladium modifier reduce the problems of foaming and permit the use of a higher ashing temperature. The detection limit of the assay is 0.9 nmol/L. Total CVs (intra- and interassay) for serum ranged from 3.5% to 15.1% and for urine from 4.8% to 14.5% at concentrations of 60.0 and 6.0 nmol/L, respectively. Analytical recoveries of bismuth added to serum and urine were 102% and 103% over the same range. The method is robust and reproducible and can be accurately calibrated with aqueous standards.
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