We describe the use of a chemometrics-based computational platform to optimize a glucose assay on a microfluidic paper-based analytical device (μPAD). Glucose is colorimetrically detected in the presence of glucose oxidase (GOx), horseradish peroxidase (HRP), and potassium iodide (KI). Using a Y-shaped paper microfluidic chip, the concentration of glucose, volume of reagents, and the length and width of the microfluidic channel were examined. The responses of the microfluidic chips were analyzed at the halfway point of the channel length. Variables affecting the response were screened by using a 24 factorial design, and among them, volume and concentration of the glucose were optimized by applying a rotatable central composite design (CCD). The optimum and experimental responses are 151.58 and 149.80, respectively, with an absolute error of 1.2%.
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Analysis of variance
Microfluidic paper-based analytical device
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The authors gratefully acknowledge financial support for this research by grants from the National Science Foundation (HRD-0934146, EEC-0812348, IIA-1448166, and HRD-1547723), the W. M. Keck Foundation, and the La Kretz Foundation.
Conflict of interest
The authors have no relevant affiliations or financial involvement with an organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties. No writing assistance was utilized in the production of this manuscript.
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Avoundjian, A., Jalali-Heravi, M. & Gomez, F.A. Use of chemometrics to optimize a glucose assay on a paper microfluidic platform. Anal Bioanal Chem 409, 2697–2703 (2017). https://doi.org/10.1007/s00216-017-0214-0
- Paper microfluidics
- Glucose oxidase
- Point-of-care diagnostic device