Microfluidic paper-based chemiluminescence biosensor for simultaneous determination of glucose and uric acid

TLDR

The authors developed a microfluidic paper‑based chemiluminescence device (μPCAD) capable of rapid, sensitive, simultaneous quantification of glucose and uric acid. The μPCAD employs glucose oxidase and urate oxidase reactions to generate hydrogen peroxide, which reacts with a rhodanine derivative in acid to produce chemiluminescence, with the assay principle explained. The device achieved simultaneous glucose and uric acid detection by varying sample travel distances, remained reproducible after 10 weeks at 4 °C, and successfully quantified both analytes in artificial urine, demonstrating an inexpensive, portable point‑of‑care platform.

Abstract

In this study, a novel microfluidic paper-based chemiluminescence analytical device (μPCAD) with a simultaneous, rapid, sensitive and quantitative response for glucose and uric acid was designed. This novel lab-on-paper biosensor is based on oxidase enzyme reactions (glucose oxidase and urate oxidase, respectively) and the chemiluminescence reaction between a rhodanine derivative and generated hydrogen peroxide in an acid medium. The possible chemiluminescence assay principle of this μPCAD is explained. We found that the simultaneous determination of glucose and uric acid could be achieved by differing the distances that the glucose and uric acid samples traveled. This lab-on-paper biosensor could provide reproducible results upon storage at 4 °C for at least 10 weeks. The application test of our μPCAD was then successfully performed with the simultaneous determination of glucose and uric acid in artificial urine. This study shows the successful integration of the μPCAD and the chemiluminescence method will be an easy-to-use, inexpensive, and portable alternative for point-of-care monitoring.