期刊
ACS SENSORS
卷 5, 期 4, 页码 1102-1109出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssensors.0c00042
关键词
colorimetric sensor array; chemical warfare agent; chemical identification; field-portable; defense
资金
- Defense Threat Reduction Agency/Joint Science and Technology Office for Chemical and Biological Defense
We report the successful use of colorimetric arrays to identify chemical warfare agents (CWAs). Methods were developed to interpret and analyze a 73-indicator array with an entirely automated workflow. Using a cross-validated first-nearest-neighbor algorithm for assessing detection and identification performances on 632 exposures, at 30 min postexposure we report, on average, 78% correct chemical identification, 86% correct class-level identification, and 96% correct red light/green light (agent versus non-agent) detection. Of 174 total independent agent test exposures, 164 were correctly identified from a 30 min exposure in the red light/green light context, yielding a 94% correct identification of CWAs. Of 149 independent non-agent exposures, 139 were correctly identified at 30 min in the red light/ green light context, yielding a 7% false alarm rate. We find that this is a promising approach for the development of a miniaturized, field-portable analytical equipment suitable for soldiers and first responders.
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