[Identification of coenzyme B12 and other natural cobalamins by polarography]

AdoCbl, MeCbl and OH-Cbl were studied by methods of polarography and three-angle scan voltammetry. Cobalamines studied show a specific electrochemical activity that can be taken as a basis for their identification after separation and purification. The high sensitivity of the method allows to carry out the quantitative analysis of AdoCbl at concentrations ranging from 10(-6) M to 10(-4) M.