Application of atmospheric pressure microwave digestion to total Kjeldahl nitrogen determination in pharmaceutical, agricultural and food productsZ. Chemat1, D.E. Hadj-Boussaad1 and F. Chemat2
1 Institut de Chimie Industrielle de Blida, BP. 270, route de Soumaa, 09000 Blida, Algérie
2 Agrotechnological Research Institute ATO-DLO, PO Box 17, 6700 AA Wageningen, The Netherlands
The kinetics of Kjeldahl's digestion for nitrogen determination was compared between microwave and classical heating conditions. Various parameters (microwave power, concentrations, time) of microwave digestion were studied in order to define the optimal digestion conditions. Finally, the Kjeldahl's analysis of nitrogen using microwave digestion was applied to various pharmaceutical, agricultural and food products.
Key words: Microwave / Kjeldahl / nitrogen / digestion.
© EDP Sciences, Wiley-VCH 1998