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Exceeding 5000-Fold Concentration of Dilute Analytes in Micellar Electrokinetic Chromatography

Quirino, Joselito P., Terabe, Shigeru·1998·Science

Abstract

When a neutral analyte zone is injected into a charged pseudostationary phase, the length of the zone is predicted to be narrowed by 1/(1 + k ), where k is the retention factor. The conditions for zone narrowing to occur assume negligible electroosmotic flow, a relatively constant electric field along the capillary column, and no pseudostationary phase in the injected analyte mixture. The theoretically expected concentration enhancement was demonstrated experimentally. Consequently, the detection sensitivity of analytes in micellar electrokinetic chromatography (MEKC) can be improved significantly. For example, 9 to 18 parts per billion of an environmentally important racemic herbicide spiked in lake water was separated by MEKC and detected by ultraviolet absorption.

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Metadata

Authors
Quirino, J. P., & Terabe, S.
Venue
Science
Published
1998-10-16
Volume
282
Issue
5388
Pages
465-468
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2005086794
Cited by
644
References
0
FWCI
26.42
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Exceeding 5000-Fold Concentration of Dilute Analytes in Micellar Electrokinetic Chromatography. https://app.cochat.ai/papers/10.1126/science.282.5388.465
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Quirino, J. P., & Terabe, S. (1998). Exceeding 5000-Fold Concentration of Dilute Analytes in Micellar Electrokinetic Chromatography. Science. https://doi.org/10.1126/science.282.5388.465

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.