1. Republican Scientific Center of Human Issues, Belarusian State University, Kurčatava 7, Minsk 220064, Belarus
2. Department of Chemistry, Belarusian State University Niezaliežnasci 4, Minsk 220030, Belarus
3. Scientific Testing Center Campilab Ltd., Centraĺnaja 30A, Dynaraŭka 222202, Belarus