Spectrophotometric determination of bromate by sequential injection analysis

J F van Staden; L V Mulaudzi; R I Stefan

doi:10.1016/j.talanta.2004.04.031

Spectrophotometric determination of bromate by sequential injection analysis

Talanta. 2004 Dec 15;64(5):1196-202. doi: 10.1016/j.talanta.2004.04.031.

Authors

J F van Staden¹, L V Mulaudzi, R I Stefan

Affiliation

¹ Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa.

PMID: 18969729
DOI: 10.1016/j.talanta.2004.04.031

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 550nm. The linear range found is between 0.18 and 3.00mgl(-1) with a detection limit of 0.15mgl(-1). The sampling rate was calculated to be 45 samples per hour. The proposed method has a precision of less than 0.8%.