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A portable explosive detector based on fluorescence quenching of pyrene deposited on coloured wax-printed μPADs.
- Source :
-
Lab on a Chip . 2013, Vol. 13 Issue 21, p4164-4172. 9p. - Publication Year :
- 2013
-
Abstract
- A new technique for the detection of explosives has been developed based on fluorescence quenching of pyrene on paper-based analytical devices (μPADs). Wax barriers were generated (150 °C, 5 min) using ten different colours. Magenta was found as the most suitable wax colour for the generation of the hydrophobic barriers with a nominal width of 120 μm resulting in fully functioning hydrophobic barriers. One microliter of 0.5 mg mL−1 pyrene dissolved in an 80 : 20 methanol–water solution was deposited on the hydrophobic circle (5 mm diameter) to produce the active microchip device. Under ultra-violet (UV) illumination, ten different organic explosives were detected using the μPAD, with limits of detection ranging from 100–600 ppm. A prototype of a portable battery operated instrument using a 3 W power UV light-emitting-diode (LED) (365 nm) and a photodiode sensor was also built and evaluated for the successful automatic detection of explosives and potential application for field-based screening. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FLUORESCENCE quenching
*PHOTOLUMINESCENCE
*FLUOROPHORES
*FLUORESCENCE
*PYRENE
Subjects
Details
- Language :
- English
- ISSN :
- 14730197
- Volume :
- 13
- Issue :
- 21
- Database :
- Academic Search Index
- Journal :
- Lab on a Chip
- Publication Type :
- Academic Journal
- Accession number :
- 100894252
- Full Text :
- https://doi.org/10.1039/c3lc50609f