Spectrophotometric methods for the determination of manganese.

A comprehensive and critical review of the available spectrophotometric methods for the determination of manganese is presented. Details are given of a wide range of direct colour-forming reactions of manganese with organic ligands, which have been claimed to be of use in analysis for the metal. The use of the very sensitive kinetic methods of analysis is also discussed. It is found that there is a paucity of reliable detail concerning the general applicability of most methods to manganese determination and that there is even less detail on the comparative value of different methods for determination of the metal in particular types of matrix.