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Related Experiment Videos

Working without accumulation membrane in flow field-flow fractionation.

P Reschiglian1, D Melucci, A Zattoni

  • 1Department of Chemistry G. Ciamician, Bologna, Italy. resky@ciam.unibo.it

Analytical Chemistry
|January 5, 2001
PubMed
Summary

A new membraneless channel for flow field-flow fractionation (FFF) offers comparable selectivity to traditional membrane systems. This approach improves quantitative performance by minimizing sample interaction and losses, particularly for micrometer-sized particles.

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Area of Science:

  • Analytical Chemistry
  • Separation Science

Background:

  • Nonideal sample interactions with separation devices are a challenge in chromatography and field-flow fractionation (FFF).
  • Traditional flow field-flow fractionation (FFF) often uses ultrafiltration membranes, limiting surface chemistry options and potentially causing secondary effects with non-protein samples.
  • The woven texture of membranes can also negatively impact FFF separation performance.

Purpose of the Study:

  • To investigate the efficacy of a novel, membraneless flow field-flow fractionation channel utilizing a bare frit as the accumulation wall.
  • To assess the performance of this membraneless system for the analysis of micrometer-sized particles.
  • To compare the results with conventional membrane-based FFF systems.

Main Methods:

  • Development and testing of a new membraneless flow field-flow fractionation channel.

Related Experiment Videos

  • Utilizing a bare frit as the accumulation wall for micrometer-sized particle analysis.
  • Comparison of selectivity and quantitative performance against membrane-based FFF systems.

    • Main Results:

    • The membraneless channel achieved selectivity comparable to membrane-based systems.
    • Relative sample recovery indicated superior quantitative performance without a membrane.
    • No sample immobilization or losses through the frit were observed in the membraneless configuration.
    • Initial findings suggest potential frit surface activity requiring further optimization.

    Conclusions:

    • A membraneless flow field-flow fractionation channel using a bare frit is a viable alternative to membrane-based systems for micrometer-sized particle analysis.
    • This approach enhances quantitative performance by mitigating nonideal sample-surface interactions and sample losses.
    • Further research is needed to optimize experimental conditions due to observed frit surface activity.