Volume 27, Number 5, June 1999Humic substances
|Page(s)||452 - 457|
Microwave - ultrasound combined reactor suitable for atmospheric sample preparation procedure of biological and chemical productsA. Lagha1, S. Chemat1, 2, P.V. Bartels2 and F. Chemat2
1 Institut de Chimie Industrielle, University of Blida, BP. 270, route de Soumaa, 09000 Blida, Algeria
2 Agrotechnological Research Institute ATO-DLO, P.O. Box 17, NL- 6700 AA Wageningen, The Netherlands
A compact apparatus in which a specific position can be irradiated by microwaves (MW) and ultrasound (US) simultaneously has been developed. The MW-US reactor has been designed for atmospheric pressure digestion and dissolution of biological and chemical products. The reactor can treat a range of throughputs of 0.1 to 10 grams of a liquid or solid sample. Its application in analytical chemistry has been shown by two examples where decreases in digestion and dissolution time were demonstrated: determination of copper in olive oil and dissolution of refractory mineral material Co3O4. Simultaneous microwave and ultrasound irradiation is shown as a new technique for atmospheric pressure digestion and dissolution of solid and liquid samples suitable for chemical and biological analysis.
Key words: Microwave / ultrasound / olive oil / mineral / digestion / dissolution.
© EDP Sciences, Wiley-VCH 1999