Sequential injection spectrophotometric method for screening bromate produced as an ozonation water disinfection by-product

Raquel B. R. Mesquita*, Francisca T. S. M. Ferreira, Ana Cerqueira, António O. S. S. Rangel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The aim of this work was the development of an automatic sequential injection analysis method to monitor the ozonation process for water disinfection. The determination was based on the reaction between bromate and o-dianisidine in the presence of bromide in acidic medium. The determination parameters were studied and adjusted to enable bromate quantification in the range 0.35-4.0 mg BrO3-/L with a limit of detection of 20 μg BrO3-/L. The choice of a sequential injection procedure enabled a minimal consumption of reagents and no need for sample pre-treatment. The developed sequential injection proved to be accurate with < 5% relative deviation when compared to ICP-MS and an average of 101% in recovery percentages studies. It was effectively applied to monitor an ozonation process enabling the follow-up of the process with real-time quantification of the bromate content.
Original languageEnglish
Pages (from-to)137-143
Number of pages7
JournalAnalytical sciences : the international journal of the Japan Society for Analytical Chemistry
Volume38
Issue number1
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • Bromate assessment
  • Flow analysis
  • Ozonation monitoring
  • Water disinfection by-products

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