... Determination of water soluble vitamins in vitamin premixes, biologically active dietary supplements and pharmaceutical preparation by HPLC with gradient elution . ... The chromatographic parameters for simultaneous determination of 12 vitamins and vitameric forms were suggested. ... Moscow University Chemistry Bulletin . 2010, Vol. ... 4, P. 315 . Copyright (C) Chemistry Dept., Moscow State University, 2002 . ... Copyright (C) Chemisty Department of Moscow State University . ...