Spectrophotometric determination of bromate in water using multisyringe flow injection analysis

Sara M. Oliveira, Marcela A. Segundo, António O. S. S. Rangel, José L. F. C. Lima, Víctor Cerdà

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A multisyringe flow injection system for the spectrophotometric determination of bromate in water is proposed, based on the oxidation of phenothiazine compounds by bromate in acidic medium. Several phenothiazines were tested, including chlorpromazine, trifluoperazine, and thioridazine. Higher sensitivity and lower LOD were attained for chlorpromazine. Interference from nitrite, hypochlorite, and chlorite was eliminated in-line, without any changes in the manifold. The automatic methodology using chlorpromazine allowed the determination of bromate between 25 and 750 μg L-1, with LOD of 6 μg L-1, good precision (RSD<1.6%, n=10), and determination frequency of 35 h-1.
Original languageEnglish
Pages (from-to)284-297
Number of pages14
JournalAnalytical Letters
Volume44
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 2011

Keywords

  • Bromate
  • Multisyringe flow injection analysis
  • Phenothiazines
  • Spectrophotometry
  • Water

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