University of Tasmania
Browse

File(s) under permanent embargo

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

journal contribution
posted on 2023-05-19, 20:34 authored by Danchana, K, Fernando Maya AlejandroFernando Maya Alejandro, Wilairat, P, Uraisin, K, Cerda, V

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 90–106%.

History

Publication title

Analytical Methods

Volume

7

Issue

10

Pagination

4202-4208

ISSN

1759-9660

Department/School

School of Natural Sciences

Publisher

Royal Society of Chemistry

Place of publication

United Kingdom

Rights statement

Copyright 2015 The Royal Society of Chemistry

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

Usage metrics

    University Of Tasmania

    Categories

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC