... Photometric and sorptionic-photometric determination of beryllium in natural object . Abstract The techniques direct photometric (2 10 –4 –5 10 –1 %) and sorptionic-photometric (2 10 –5 –2 10 –4 %) methods of determination berillium in natural objects in the form mixed-ligand of a complex with chromazurol S and bromide N-cetylpyrydinium, having high molar coefficient of absorption are developed. ... Moscow University Chemistry Bulletin . 2014, Vol. ... Copyright (C) Chemistry Dept., ...