Abstract
A method is described for the comprehensive determination of a series of trace and ultratrace elements (Fe, Mn, Zn, Cu, Sr, Cr, Al and Si) in human saliva by atomic absorption spectrometry with electrothermal atomization and Zeeman-effect background correction. Procedures for sampling of “total mixed” saliva and its treatment including centrifugation and mineralization by HNO3 are described in detail. To avoid the use of matrix modifiers, element standards with an “artificial saliva” matrix were used to construct calibration curves. Instrumental precision, tested by repeated analyses of natural salivas, is good (error less than 5%) for most elements. Lower precision was obtained for elements like Al and Si present in concentrations close to the detection limit. The analysis of some natural salivas clearly shows the influence of the sampling and treatment procedures on the reliability of the data. An accurate standardization of these procedures is thus recommended.
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Sighinolfi, G.P., Gorgoni, C., Bonori, O. et al. Comprehensive determination of trace elements in human saliva by ETA-AAS. Mikrochim Acta 97, 171–179 (1989). https://doi.org/10.1007/BF01242463
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DOI: https://doi.org/10.1007/BF01242463