Free Access
Volume 27, Number 5, June 1999
Humic substances
Page(s) 452 - 457
Section Original articles
Analusis 27, 452-457 (1999)
DOI: 10.1051/analusis:1999124

Microwave - ultrasound combined reactor suitable for atmospheric sample preparation procedure of biological and chemical products

A. 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