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RESEARCH PRODUCT
Determination of ultratrace bismuth in milk samples by atomic fluorescence spectrometry.
Miguel De La GuardiaAgustín PastorPatricia Cava-montesinosM. Luisa Cerverasubject
Quality ControlAnalytical chemistrychemistry.chemical_elementBorohydridesMass spectrometryAtomic fluorescence spectrometrySensitivity and SpecificityFluorescenceAnalytical ChemistryBismuthCow milkDigestion (alchemy)Environmental ChemistryAnimalsArgonMicrowavesPharmacologyDetection limitHydrideSpectrum AnalysisMilkAshingchemistrySpainIndicators and ReagentsAgronomy and Crop ScienceBismuthFood Sciencedescription
Abstract 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-07-01 | Journal of AOAC International |