Optimization and development of a high-performance liquid chromatography-based one-site immunometric assay with chemiluminescence detection

Matthew R. Oates, William Clarke, Alden Zimlich, David S. Hage

Research output: Contribution to journalArticle

Abstract

Various practical and theoretical considerations were examined in the creation and optimization of a high-performance liquid chromatography (HPLC)-based one-site immunometric assay. This method used an HPLC analyte analog column and post-column chemiluminescence detection. The specific analyte chosen as the model for this study was L-thyroxine (also known as T4). In this technique, a sample containing thyroxine was first combined with an excess of anti-T4 antibody Fab fragments that had earlier been conjugated with chemiluminescent acridinium ester labels. After incubation, the mixture was injected onto a column that contained immobilized T4. The amount of thyroxine in the original sample was then determined by measuring the labeled Fab fragments that appeared in the non-retained fraction, or the decrease in excess Fab fragments that were bound to and later eluted from the column. Items considered in creating this assay included the preparation of acridinium ester-labeled Fab fragments, the detection of these fragments with a post-column reactor, and the creation of a suitable immobilized analog column for capturing excess labeled Fab fragments. The final method could measure T4 in standards at clinically-relevant concentrations and provided a response within 1.5min of sample injection, following a 20-45min incubation with the labeled Fab fragments. Possible applications of this method include its use in clinical chemistry and the screening of proteomic or combinatorial libraries.

Original languageEnglish (US)
Pages (from-to)37-50
Number of pages14
JournalAnalytica Chimica Acta
Volume470
Issue number1
DOIs
StatePublished - Oct 11 2002
Externally publishedYes

Keywords

  • Chemiluminescence
  • Chromatographic immunoassay
  • One-site immunometric assay
  • Post-column detection
  • Thyroxine

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

Fingerprint Dive into the research topics of 'Optimization and development of a high-performance liquid chromatography-based one-site immunometric assay with chemiluminescence detection'. Together they form a unique fingerprint.

  • Cite this