METHOD OF DETERMINING IRON (II) Russian patent published in 2015 - IPC G01N31/22 

FIELD: chemistry.

SUBSTANCE: method includes the preparation of a sorbent, solution of iron (III, II), addition of a hydroxylamine solution to reduce iron (III) to iron (II), extraction of iron (II) from the solution by the sorbent, transfer of iron (II) in a complex compound on the sorbent surface, separation of the sorbent from the solution, measurement of the coefficient of diffusion reflection of the surface iron (II) complex and determination of the iron content by a calibration graph, with the application as the sorbent of aluminium oxide, successively modified by polyhexamethyleneguanidine and 3-(2-pyridyl)-5,6-diphenyl-1.2,4-triazine-4',4''-disulphoacid (ferrozine), with carrying out the measurement of a diffusion reflection coefficient at 560 nm.

EFFECT: increased sensitivity and self-descriptiveness of the analysis.

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