A colorimetric sensor based on a polymethacrylate matrix with immobilized 1-(2-pyridylazo)-2-naphthol for the determination of cobalt

作者：Gavrilenko N A^*; Saranchina N V; Gavrilenko M A

来源：Journal of Analytical Chemistry, 2015, 70(12): 1475-1479.

DOI：10.1134/S1061934815120060

• cobalt
• immobilized reagent
• polymethacrylate matrix
• colorimetric sensor
• solid-phase spectrophotometry

A colorimetric sensor is proposed for the determination of cobalt. It is prepared by immobilizing 1-(2-pyridylazo)-2-naphthol (PAN) in an optically transparent polymethacrylate matrix. The conditions for determining cobalt by the proposed colorimetric sensor are found in the study of the complexation of cobalt with a PAN-modified polymethacrylate matrix. The determination is based on the interaction of the sensor with a cobalt solution at pH 4 for 5 min, followed by the measurement of absorbance at 620 nm. The sensor ensures the determination of 0.05-0.50 mg/L of cobalt with the detection limit 0.03 mg/L. It is demonstrated that the sensor can be used for the determination of cobalt in the Cyanocobalamin medical preparation and potable water.

• 出版日期2015-12
• 单位香港理工大学