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Related Experiment Video

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Fabrication of Three-dimensional Paper-based Microfluidic Devices for Immunoassays
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Isoelectric focusing on microfluidic paper-based chips.

Siyang Yu1, Chunfang Yan1, Xianqiao Hu2

  • 1Chemistry Instrumentation Center, Department of Chemistry, Zhejiang University, Hangzhou, 310027, Zhejiang, China.

Analytical and Bioanalytical Chemistry
|July 19, 2019
PubMed
Summary
This summary is machine-generated.

This study integrates isoelectric focusing (IEF) into microfluidic paper-based analytical devices (μPADs) for efficient protein separation. The developed μPADs offer a low-cost, simple, and disposable platform for protein analysis.

Keywords:
Isoelectric focusingMicrofluidic paper-based chipsProteinSeparation

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Microfluidics

Background:

  • Isoelectric focusing (IEF) is a key technique for protein separation and enrichment.
  • Microfluidic paper-based analytical devices (μPADs) offer advantages in cost, simplicity, and disposability.
  • Integrating IEF with μPADs presents an opportunity for novel protein analysis platforms.

Purpose of the Study:

  • To develop and optimize a microfluidic paper-based analytical device (μPAD) for isoelectric focusing (IEF).
  • To demonstrate the capability of the μPAD-IEF system for simultaneous protein separation and enrichment.
  • To evaluate the performance of the developed system compared to conventional methods.

Main Methods:

  • Fabrication of μPADs using octadecyltrichlorosilane (OTS) silanization and region-selective plasma treatment.
  • Optimization of IEF conditions, including ampholyte concentration, polyvinylpyrrolidone (PVP) for electroosmotic flow (EOF) suppression, and focusing voltage.
  • Demonstration of protein separation and enrichment using myoglobin and cytochrome C.
  • Parallel IEF on multichannel μPADs for simultaneous analysis of multiple samples.

Main Results:

  • Successful integration of isoelectric focusing (IEF) onto microfluidic paper-based analytical devices (μPADs).
  • Optimized μPAD-IEF system demonstrated simultaneous separation and enrichment of myoglobin and cytochrome C.
  • Parallel IEF on multichannel μPADs achieved effective separation of multiple protein samples.
  • The developed system showed comparable performance to conventional gel-IEF.

Conclusions:

  • The developed IEF on μPADs is a low-cost, simple, and disposable platform for protein separation and enrichment.
  • This technology holds significant potential for various applications in protein analysis.
  • μPAD-based IEF offers a promising alternative to traditional protein separation techniques.