期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 395, 期 2, 页码 371-376出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-009-2788-7
关键词
Hydrogen peroxide; Prussian-blue; Vapor sensor; Screen-printed electrodes; Explosives; Security screening
资金
- Motorola Inc.
- US DIA
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.
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