Determination of ultratrace bismuth in milk samples by atomic fluorescence spectrometry
A sensitive procedure was developed for determination of bismuth (Bi) in milk samples by hydride generation atomic fluorescence spectrometry (HG-AFS) after microwave-assisted sample digestion with HNO3 and H2O2. The method provides a sensitivity of 1832 fluorescence units (ng/mL) with a detection li...
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Published in | Journal of AOAC International Vol. 86; no. 4; p. 815 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
England
01.07.2003
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Subjects | |
Online Access | Get more information |
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Summary: | A sensitive procedure was developed for determination of bismuth (Bi) in milk samples by hydride generation atomic fluorescence spectrometry (HG-AFS) after microwave-assisted sample digestion with HNO3 and H2O2. The method provides a sensitivity of 1832 fluorescence units (ng/mL) with a detection limit of 0.01 ng/mL, which corresponds to 20 pg absolute limit of detection, equivalent to 0.50 ng/g in the original sample. Application of the methodology to cow milk samples from the Spanish market showed the presence of Bi at a concentration of 11.8-28.8 ng/g, which compared well with data obtained after dry ashing of samples and with data obtained by inductively coupled plasma-mass spectrometry after microwave-assisted digestion. |
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ISSN: | 1060-3271 |
DOI: | 10.1093/jaoac/86.4.815 |