Issue |
Analusis
Volume 26, Number 7, September 1998
Preparative Chromatography
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Page(s) | 261 - 263 | |
Section | Original articles | |
DOI | https://doi.org/10.1051/analusis:1998171 |
DOI: 10.1051/analusis:1998171
Optimized microwave digestion procedure for cadmium analysis of mussel samples
M.C. Yebra and M.F. EnríquezDepartment of Analytical Chemistry, Nutrition and Bromatology, Chemistry Faculty, University of Santiago, 15706-Santiago de Compostela, Spain
Abstract
A simple and rapid acid sample digestion method by microwave heating in high pressure teflon bombs is reported for the determination of cadmium in mussels by flame atomic absorption
spectrometry (FAAS) coupled on-line with a flow-injection preconcentration system. Tests concerning the digestion time, the power of the microwaves and the amount of nitric acid were studied
with the National Research Council of Canada lobster hepatopancreas marine (Tort-1) as certified reference material. Using 2 min of digestion time and 2 mL of nitric acid, the complete
dissolution of 0.2 g of freeze dried sample is possible. The analytical results, obtained with calibration graph as well as by the standard addition method, were agreed well with the certified value
of the reference material. This procedure was applied to the determination of cadmium in mussel samples from estuaries in Galicia, Spain.
Key words: Microwave acid digestion / cadmium / mussels / flame atomic absorption spectrometry.
© EDP Sciences, Wiley-VCH 1998