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On-line sample pre-concentration in microfluidic devices: a review.

Braden C Giordano1, Dean S Burgi, Sean J Hart

  • 1Naval Research Laboratory, Chemistry Division, Washington, DC 20375-5342, United States. braden.giordano@nrl.navy.mil

Analytica Chimica Acta
|February 7, 2012
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Summary

On-chip sample preconcentration techniques are vital for improving microfluidic separation platforms. This review explores various methods to enhance detection limits and analyte purification for advanced chip-based applications.

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Area of Science:

  • Analytical Chemistry
  • Microfluidics
  • Separation Science

Background:

  • On-line sample preconcentration is crucial for microfluidic separation platforms.
  • Novel methods are needed to improve detection limits and analyte purification.
  • Existing techniques must compete with traditional separation methods.

Purpose of the Study:

  • To review on-chip concentration enhancement techniques for microfluidic devices.
  • To familiarize readers with fundamental principles governing these enhancements.
  • To inspire further development and application of these techniques.

Main Methods:

  • Review of existing literature on on-chip preconcentration.
  • Focus on electrophoretic and non-electrophoretic preconcentration modes.
  • Analysis of device design and preconcentration mechanisms.

Main Results:

  • Discussion of various on-chip concentration enhancement strategies.
  • Highlighting methods that improve detection limits and analyte purity.
  • Categorization of techniques based on electrophoretic and non-electrophoretic principles.

Conclusions:

  • On-chip preconcentration significantly advances microfluidic separation capabilities.
  • Understanding fundamental principles is key to developing improved techniques.
  • This review provides a foundation for future innovation in microfluidic sample preparation.