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Title: Microfluidic paper-based analytical device for quantification of lead using reaction band-length for identification of bullet hole and its potential for estimating firing distance
Authors: Supatana Buking
Phoonthawee Saetear
Warawut Tiyapongpattana
Kanchana Uraisin
Prapin Wilairat
Duangjai Nacapricha
Nuanlaor Ratanawimarnwong
Mahidol University
Thammasat University
Srinakharinwirot University
Flow Innovation-Research for Science and Technology Laboratories (FIRST Labs.
Keywords: Chemistry
Issue Date: 1-Jan-2018
Citation: Analytical Sciences. Vol.34, No.1 (2018), 83-89
Abstract: © The Japan Society for Analytical Chemistry, 2018. A low-cost and user-friendly microfluidic paper-based analytical device (μPAD) was developed for identification of bullet hole from gunshot residue (GSR) on cotton fabric target. The device (25 × 82 mm) is made of filter paper with a printed pattern consisting of a circular sample loading reservoir (6 mm i.d.), a circular waste reservoir (4 mm i.d.) and a straight flow channel (3 mm wide and 60 mm long). A sticker with a ruler scale in millimeters was mounted alongside the channel. The straight channel is first impregnated with rhodizonate and dried at ambient temperature. Tartrate extract of the target fabric is loaded on the sample reservoir. If Pb(II) ions are present in the extract, pink streak of Pb(II)- rhodizonate precipitate is formed as the sample solution flows from the reservoir along the channel. The length of the pink strip is employed to estimate the firing distance.
ISSN: 13482246
Appears in Collections:Scopus 2018

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