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Sample introduction techniques for microfabricated separation devices.

Elizabeth S Roddy1, Hongwei Xu, Andrew G Ewing

  • 1Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.

Electrophoresis
|January 27, 2004
PubMed
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Microchip electrophoresis systems, or micro total analysis systems (micro-TAS), are advancing high-throughput, low-cost analysis. This review focuses on sample introduction methods crucial for DNA analysis in these microdevices.

Area of Science:

  • Analytical Chemistry
  • Biotechnology
  • Genomics

Background:

  • Micro total analysis systems (micro-TAS) have seen significant development since 1990.
  • Applications in genomics, proteomics, and drug discovery demand high-throughput, low-cost analytical methods.
  • Electrophoresis is a cornerstone of micro-TAS, essential for separation in many assays, especially DNA analysis in genomics.

Purpose of the Study:

  • To review sample introduction techniques for microfabricated electrophoretic devices (chips).
  • To highlight the importance of sample introduction for the widespread application of chip electrophoresis.
  • To discuss challenges including automation, high-volume sample delivery, and precise picoliter-scale injection.

Main Methods:

  • Review of existing literature on sample introduction in micro-TAS for electrophoresis.

Related Experiment Videos

  • Focus on techniques applicable to DNA analysis.
  • Examination of challenges in sample handling and injection on microchips.

    • Main Results:

    • Sample introduction is a critical bottleneck for chip electrophoresis.
    • Effective sample introduction enables high-throughput and automation.
    • Precise control over picoliter sample volumes is achievable.

    Conclusions:

    • Advancements in sample introduction are vital for realizing the full potential of micro-TAS.
    • Improved sample handling is key to making chip electrophoresis a broadly applicable analytical technique.
    • Addressing challenges in automation and precision injection will drive future microfluidic applications.