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Spectrophotometric determination of bromide in water using the multisyringe flow injection analysis technique coupled to a gas-diffusion unit

Citation

Danchana, K and Maya, F and Wilairat, P and Uraisin, K and Cerda, V, Spectrophotometric determination of bromide in water using the multisyringe flow injection analysis technique coupled to a gas-diffusion unit, Analytical Methods, 7, (10) pp. 4202-4208. ISSN 1759-9660 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 The Royal Society of Chemistry

DOI: doi:10.1039/c5ay00202h

Abstract

A novel spectrophotometric method for the determination of bromide has been developed using the Multisyringe Flow Injection Analysis technique (MSFIA). This method is based on the decolorization of methylene blue by the bromine released from the oxidation of bromide by bromate under acidic conditions. By incorporating a gas-diffusion unit into the MSFIA system the transferred bromine reacts with methylene blue in the acceptor stream. The decrease of the methylene blue absorbance is monitored at 745 nm. The oxidation conditions are not strong enough to oxidize chloride to chlorine, which is a major component of both natural and seawater. The proposed method provides linearity for the determination of bromide over a range of 1 10−5 mol L−1 to 6 10−5 mol L−1 in 5 10−2 mol L−1 of chloride, with a correlation coefficient (r2) of 0.9939, and a precision of 3.1% (%RSD for 3 10−5 mol L−1 Br in 5 10−2 mol L−1 Cl, n = 10). The limit of detection (3σ) is 0.5 10−5 mol L−1. The proposed method has been applied to the determination of Br in water samples, obtaining recoveries in the analysis of spiked tap, natural, and seawater samples in the range of 90106%.

Item Details

Item Type:Refereed Article
Keywords:flow analysis, kinetic methods
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Flow analysis
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Maya, F (Mr Fernando Maya Alejandro)
ID Code:127846
Year Published:2015
Web of Science® Times Cited:12
Deposited By:Chemistry
Deposited On:2018-08-19
Last Modified:2018-09-06
Downloads:0

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