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논문 기본 정보

자료유형
학술저널
저자정보
한효구 (강릉원주대학교) 최석정 (강릉원주대학교)
저널정보
한국바이오칩학회 BioChip Journal BioChip Journal Vol.15 No.2
발행연도
2021.1
수록면
179 - 186 (8page)

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초록· 키워드

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Visual volumetric chips based on gas-generating reactions can potentially be applied to instrument-free point-of-care testing (POCT). However, the structures of conventional chips and their detection methods are typically complicated due to two technical issues: (1) ink, as a distance marker, must be injected into a specifi ed position before sample introduction, and (2) the gas-generating reaction must be initiated in a sealed state. In this study, an inkless volumetric chip operated with a micropipette was developed. The volumetric chip consisted of a reaction well (R well), a substrate well (S well) containing a H 2 O 2 solution as an O 2 generator, and a channel connecting the upper side of the R well and the lower side of the S well. Sample injection into the R well is followed by the insertion of a micropipette that is used to exert a negative pressure, which subsequently drives the transfer of a large portion of the H 2 O 2 solution to the R well to initiate the gas-generating reaction. Meanwhile, a small portion of the H 2 O 2 solution remains in the channel for use as a distance marker. The performance of the volumetric chip was evaluated by detecting Salmonella typhimurium , aff ording a limit of detection of 10 CFU within 20 min for culture samples and within 75 min for spiked milk samples. The volumetric chip developed herein is advantageous for POCT applications due to its simple structure and detection process.

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