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An optoelectronic nose for identification of explosives.

ABSTRACT: Compact and portable methods for identification of explosives are increasingly needed for both civilian and military applications. A portable optoelectronic nose for the gas-phase identification of explosive materials is described that uses a highly cross-reactive colorimetric sensor array and a handheld scanner. The array probes a wide range of chemical reactivities using 40 chemically responsive colorimetric indicators, including pH sensors, metal-dye salts, redox-sensitive chromogenic compounds, solvatochromic dyes, and other chromogenic indicators. Sixteen separate analytes including common explosives, homemade explosives, and characteristic explosive components were differentiated into fourteen separate classes with a classification error rate of <1%. Portable colorimetric array sensing could represent an important, complementary part of the toolbox used in practical applications of explosives detection and identification.

SUBMITTER: Askim JR

PROVIDER: S-EPMC5952316 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature

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An optoelectronic nose for identification of explosives.

Askim Jon R JR Li Zheng Z LaGasse Maria K MK Rankin Jaqueline M JM Suslick Kenneth S KS

Chemical science 20151007 1

Compact and portable methods for identification of explosives are increasingly needed for both civilian and military applications. A portable optoelectronic nose for the gas-phase identification of explosive materials is described that uses a highly cross-reactive colorimetric sensor array and a handheld scanner. The array probes a wide range of chemical reactivities using 40 chemically responsive colorimetric indicators, including pH sensors, metal-dye salts, redox-sensitive chromogenic compoun ...[more]

PMID: 29861977

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