Microchip Electrophoretic Immunoassay for Serum Cortisol

Lance B. Koutny, Dieter Schmalzing, Todd A. Taylor, and Martin Fuchs*
PerSeptive Biosystems, Framingham, Massachusetts 01701
Anal. Chem., 1996, 68 (1), pp 18–22
DOI: 10.1021/ac9508311
Publication Date (Web): January 1, 1996
Copyright © 1996 American Chemical Society
*

In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.

Abstract

An immunoassay performed using a microchip electrophoretic system is described. Separation and quantitation of free and bound labeled antigen in a competitive assay are carried out in channels micromachined into fused silica substrates. Such microchips are attractive because of their small size, ruggedness, and amenability to automated handling. The assay achieves the determination of cortisol in blood serum over the range of clinical interest (1−60 μg/dL) without the need for extraction or other sample preparation steps. The separation is performed in less than 30 s. Very high throughput is possible by operating the assay in multiple channels in parallel. These characteristics make microchip electrophoretic systems a promising technology for the rapid analysis of clinical samples.

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History

  • Published In Issue January 01, 1996
  • Received for review August 15, 1995. Accepted October 10, 1995.

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