TY JOUR TI ANALYSIS OF A SAMPLE OF DIHYDROQUERCETIN FOR CONTENT IMPURITIES KW digidroqbuercetin KW quercetin KW aromadendrin,naringin KW luteolin KW chromatography KW membrane purification KW retention time KW integral spectral ratio of peaks. JO Modern Technologies and Scientific and Technological Progress AU Kondrat'eva, L.M. AU Sverdlova, O.L. AU Dobrynina, N.N. PY 2022 IS 2021 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»