Amperometric sensing of hydrogen peroxide vapor for security screening

John Benedet, Donglai Lu, Karel Cizek, Jeffrey LaBelle, Joseph Wang

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Rapid detection of the hydrogen peroxide precursor of peroxide explosives is required in numerous security screening applications. We describe a highly sensitive and selective amperometric detection of hydrogen peroxide vapor at an agarose-coated Prussian-blue (PB) modified thick-film carbon transducer. The sensor responds rapidly and reversibly to dynamic changes in the level of the peroxide vapor, with no apparent carry over and with a detection limit of 6 ppbv. The remarkable selectivity of the PB-based screen-printed electrode towards hydrogen peroxide leads to effective discrimination against common beverage samples. For example, blind tests have demonstrated the ability to selectively and non-invasively identify concealed hydrogen peroxide in drinking cups and bottles. The attractive performance of the new microfabricated PB-based amperometric peroxide vapor sensor indicates great potential for addressing a wide range of security screening and surveillance applications.

Original languageEnglish (US)
Pages (from-to)371-376
Number of pages6
JournalAnalytical and Bioanalytical Chemistry
Volume395
Issue number2
DOIs
Publication statusPublished - Sep 2009

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Keywords

  • Explosives
  • Hydrogen peroxide
  • Prussian-blue
  • Screen-printed electrodes
  • Security screening
  • Vapor sensor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry

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