Journal
SENSORS
Volume 21, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/s21238041
Keywords
multi-explosives; digital images; RGB intensity values; 96-well plates; colorimetric detection; polymer gel sensor
Funding
- National Research Council of Thailand [SCI6305166b]
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Polymer gel sensors on 96-well plates were used to detect multi-explosives with good linear range, sensitivity, and specificity. The RGB color analysis allowed for quantitative analysis of reaction products, demonstrating the method's potential for on-site screening of explosives.
Polymer gel sensors on 96-well plates were successfully used to detect four different multi-explosives, including 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), nitrite, and perchlorate. The products of reactions between the explosives and the polymer gel sensors were digitally captured, and the images were analyzed by a developed Red-Green-Blue (RGB) analyzer program on a notebook computer. RGB color analysis provided the basic color data of the reaction products for the quantification of the explosives. The results provided good linear range, sensitivity, limit of detection, limit of quantitation, specificity, interference tolerance, and recovery. The method demonstrated great potential to detect explosives by colorimetric analysis of digital images of samples on 96-well plates. It is possible to apply the proposed method for quantitative on-site field screening of multi-explosives.
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