Abstract
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.
Original language | English |
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Pages (from-to) | 1475-1479 |
Number of pages | 5 |
Journal | Journal of Analytical Chemistry |
Volume | 70 |
Issue number | 12 |
DOIs | |
Publication status | Published - 1 Dec 2015 |
Keywords
- cobalt
- colorimetric sensor
- immobilized reagent
- polymethacrylate matrix
- solid-phase spectrophotometry
ASJC Scopus subject areas
- Analytical Chemistry