A. Niazi, S. Afshar
Mar 31, 2011
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Influential Citations
2
Citations
Journal
Journal of the Iranian Chemical Research
Abstract
A novel optical sensor has been proposed for sensitive determination of bismuth ion based on immobilization of 4-(4-nitrophenylazo)-1-naphthol on a triacetylcellulose membrane. Chemical binding of bismuth ions in solution with a 4-(4-nitrophenylazo)-1-naphthol immobilized on the triacetylcelluse surface could be monitored spectrophotometrically. The optode shows excellent response over wide concentration range 0.4-3.6 μg mL bismuth with a limit of detection of 0.14 μg mL bismuth. The influence of factors responsible for the improved sensitivity of the sensor were studied and identified. The response time of the optode was 30 sec for a stirrer solution. The influence of potential interfering ions on the determination of 0.4 μg mL bismuth was studied. The proposed optode was applied to the determination of bismuth in pharmaceutical formulation samples.