METHOD OF DETERMINING COBALT (II) USING POLYMETHACRYLATE MATRIX Russian patent published in 2011 - IPC G01N31/22 

FIELD: chemistry.

SUBSTANCE: method involves preparation of a cobalt (II) solution, extraction of cobalt (II) using a membrane with immobilised 1-(2-pyridylazo)-2-naphthol, followed by separation thereof from the solution, measuring the analytical signal and calculating content of cobalt (II). The membrane used is a polymethacrylate matrix with immobilised 1-(2-pyridylazo)-2-naphthol and the analytical signal used is light absorption at 620 nm or visual estimation of the colour intensity of the optical membrane. Content of cobalt is calculated using a calibrated curve or a visual test method.

EFFECT: high sensitivity and information content of analysis.

4 ex, 3 tbl, 1 dwg