| Summary: | Introduction. Lingonberry (Vaccinium vitis-idaea L.) belongs to Ericaceae family. It is widely spread in the northern hemisphere in such countries as Russia, Lithuania, Latvia, Iceland, Scandinavian countries and etc. Lingonberry fruits have anti-inflammatory [1], antibacterial, antioxidative [2] activities and effect on the cardiovascular system [3]. Most of the biological activities of herbal extracts are contributed to polyphenolic content. Meterials and methods. The aim of this study was to evaluate variation of qualitative and quantitative composition of phenolic compounds, proanthocyanidins and anthocyanins in the samples of lingonberry (Vaccinium vitis-idaea L.) fruits growing in natural habitats of Lithuania. Spectrophotometric methods were applied respectively. Fruit samples were extracted with 70 % (v/v) ethanol 15 min in ultrasonic bath. The total phenolic content has been evaluated by Folin-Ciocalteu method. The total proanthocyanidins content has been determined using DMCA (4 – dimethylaminocinnamaldehyde) UV-VIS spectrophotometric method. Total anthocyanins content was assayed according to the European Pharmacopoeia. Results. Analysis of the composition of phenolic compounds in lingonberry fruits showed that the total content of phenolic compounds varies from 18,23±0,8 mg/g to 42,78±2,36 mg/g. The total content of proanthocyanidins varies from 0,67±0,5 mg/g to 15,61±3,82 mg/g, anthocyanins alters from 0,22±0,06 mg/g to 1,93±0,11 mg/g in analyzed samples. FRAP and ABTS methods were applied for the determination of antiradical activity of berries exctracts. Conclusions. The results of this research indicated that the amount of investigated biologically active compounds in lingonberry (Vaccinium vitis-idaea L.) fruit samples varies due to the vegetation period and different cenopopulation.
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