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Chemical Research in Chinese Universities

, Volume 34, Issue 6, pp 899–904 | Cite as

Quantitative Determination of Urine Glucose: Combination of Laminar Flow in Microfluidic Chip with SERS Probe Technique

  • Dan Sun
  • Xiangyuan Liu
  • Shuping Xu
  • Yu Tian
  • Weiqing Xu
  • Yanchun TaoEmail author
Article
  • 19 Downloads

Abstract

A surface-enhanced Raman scattering(SERS) sensing approach for urine glucose was developed based on the laminar flow technology in a cross-type microfluidic chip with SERS probes, 4-mercaptophenylboronic acid (MPBA) functionalized Ag nanoparticles. MPBA as the glucose receptor can identify and bind up with glucose at a molar ratio of 2:1, which can cause the aggregation of SERS probes at a certain position of the chip channel and further enhance the SERS signal of MPBA significantly. Thus, the quantitative SERS detection of glucose was achieved indirectly. No sample pretreatment and separation were needed in this method since the SERS detection was achieved in the gradient diffusion and molecular recognition processes between urine glucose and SERS probe in the laminar flow, which simplified the sample treatment procedures, saved detection time and made it feasible for clinic applications. This method shows a good linear relationship within human body’s normal physiological range and has high sensitivity and selectivity. The lowest detection concentration can reach 1.0 mg/dL.

Keywords

Surface-enhanced Raman scattering(SERS) Microfluidic chip 4-Mercaptophenylboronic acid Uurine glucose 

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Copyright information

© Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Dan Sun
    • 1
  • Xiangyuan Liu
    • 1
  • Shuping Xu
    • 1
  • Yu Tian
    • 1
  • Weiqing Xu
    • 1
  • Yanchun Tao
    • 1
    Email author
  1. 1.Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical ChemistryJilin UniversityChangchunP. R. China

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