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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Bibliographic Details
Published inJournal of AOAC International Vol. 86; no. 4; p. 815
Main Authors Cava-Montesinos, Patricia, Cervera, M Luisa, Pastor, Agustín, de la Guardia, Miguel
Format Journal Article
LanguageEnglish
Published England 01.07.2003
Subjects
Animals
Argon
Bismuth - analysis
Borohydrides - analysis
Fluorescence
Indicators and Reagents
Microwaves
Milk - chemistry
Quality Control
Sensitivity and Specificity
Spain
Spectrum Analysis - methods
Spain
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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.
ISSN:1060-3271
DOI:10.1093/jaoac/86.4.815