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Development of a flow-through optosensor for determination of Co(II)

Yusof, Nor Azah and Ahmad, Musa (2008) Development of a flow-through optosensor for determination of Co(II). Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 69 (2). pp. 413-418. ISSN 0584-8539

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A flow-through optical fibre chemical sensor for the determination of Co(II) at trace level using immobilised 2-(4-pyridylazo)resorcinol (PAR) as the reagent phase is proposed. PAR is physically adsorbed onto XAD-7. This method provided a great sensitivity and simplicity with wide linear response range from 1 × 10−2 to 1 × 103 ppm and detection limit of 20 ppb. This method also showed a reproducible result with relative standard deviation (R.S.D.) of 1.78% and response time of 5 min. The response towards Co(II) was also reversible using acidified KCl as the regenerating solution. Interference studies showed that Cr(III) significantly interfered during the determination. Excellent agreement with reference to inductively coupled plasma optical emission spectroscopy (ICPOES) method was achieved when the developed sensor was applied for determination of Co(II) in aqueous samples.

Item Type:Article
Keyword:Flow injection analysis (FIA), Co(II) detection, Optical fibre sensor
Faculty or Institute:Faculty of Science
DOI Number:10.1016/j.saa.2007.04.015
ID Code:5826
Deposited By: Najwani Amir Sariffudin
Deposited On:05 May 2010 09:58
Last Modified:11 Nov 2015 09:13

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