Article (Scientific journals)
Printable QR code paper microfluidic colorimetric assay for screening volatile biomarkers
Burklund, A.; Saturley-Hall, H. K.; Franchina, Flavio et al.
2019In Biosensors and Bioelectronics, 128, p. 97-103
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Keywords :
Gas Chromatography - Mass Spectrometry; Mobile Health; Paper Microfluidics; Sepsis; Volatile Organic Compounds; Biomarkers; Codes (symbols); Color; Colorimetry; Drug products; Escherichia coli; Mass spectrometry; Microfluidics; Mobile telecommunication systems; Paper; Polycyclic aromatic hydrocarbons; Bloodstream infections; Gas chromatography-mass spectrometry; Headspace solid phase microextraction; Microfluidic platforms; Real-time diagnostics; Time of flight mass spectrometry; Two dimensional gas chromatography; Gas chromatography
Abstract :
[en] We present a QR code paper microfluidic colorimetric assay that can exploit the hardware and software on mobile devices, and circumvent sample preparation by directly targeting volatile biomarkers. Our platform is a printable microarray of well-defined reaction regions, which outputs an instant diagnosis by directing the user to a URL containing their test result, while simultaneously storing epidemiological data for remote access and bioinformatics. To assist in the rapid identification of Escherichia coli in bloodstream infections, we employed an existing colorimetric reagent (p-dimethylaminocinnamaldehyde) and adapted its use to detect volatile indole, a biomarker produced by E. coli. Our assay was able to quantitatively detect indole in the headspace of E. coli culture after 12 h of growth (27.0 ± 3.1 ppm), assisting in species-level identification hours earlier than existing methods. Results were confirmed with headspace solid-phase microextraction (HS-SPME) two-dimensional gas chromatography time-of-flight mass spectrometry (GC×GC-ToFMS), which estimated indole concentration in E. coli culture to average 32.3 ± 5.2 ppm after 12 h of growth. This QR paper microfluidic platform represents a novel development in both telemedicine and diagnostics using volatile biomarkers. We envision that our QR code platform can be extended to other colorimetric assays for real-time diagnostics in low-resource environments. © 2018 Elsevier B.V.
Disciplines :
Life sciences: Multidisciplinary, general & others
Author, co-author :
Burklund, A.;  Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States
Saturley-Hall, H. K.;  Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States
Franchina, Flavio ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique, organique et biologique
Hill, J. E.;  Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States
Zhang, J. X. J.;  Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, United States
Language :
English
Title :
Printable QR code paper microfluidic colorimetric assay for screening volatile biomarkers
Publication date :
2019
Journal title :
Biosensors and Bioelectronics
ISSN :
0956-5663
eISSN :
1873-4235
Publisher :
Elsevier Ltd
Volume :
128
Pages :
97-103
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 March 2019

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