1. Department of Food Technology, Faculty of Food Science, Warsaw University of Life Sciences, Warsaw, Poland.
2. Department of Instrumental Analysis, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences, Warsaw, Poland.
3. Corresponding author. Phone: +4822 5937072 (81). Fax: +4822 5937071. E-mail address: jarosława_rutkowska@sggw.pl