Spectrophotometric determination of bromate by sequential injection analysis |
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Authors: | van Staden J F Mulaudzi L V Stefan R I |
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Institution: | Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa |
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Abstract: | A simple and rapid on-line spectrophotometric method for the determination of bromate is proposed. The method is based on the reaction of bromate and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-bromo-PADAP) with SCN−, a red complex is formed and monitored at 550 nm. The linear range found is between 0.18 and 3.00 mg l−1 with a detection limit of 0.15 mg l−1. The sampling rate was calculated to be 45 samples per hour. The proposed method has a precision of less than 0.8%. |
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Keywords: | Disinfection Chlorination Trifluoperazine |
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