Clinical Chemistry and Laboratory Medicine

Issue: Aug 2006

Volume 44, Number 8

A robust liquid chromatography tandem mass spectrometry method for total plasma homocysteine determination in clinical practice

Véronique Ducros,

1. Département de Biologie Intégrée, Centre Hospitalier Universitaire, Grenoble, France

1
Hélène Belva-Besnet,

2. Applied Biosystems, Courtaboeuf, France

2
Bruno Casetta,

3. Applied Biosystems, Monza, Italy

3
Alain Favier

4. Département de Biologie Intégrée, Centre Hospitalier Universitaire, Grenoble, France

4
Corresponding author: Véronique Ducros, Département de Biologie Intégrée, Pavillon B, Centre Hospitalier Universitaire, BP 217, 38043 Grenoble cedex, France Phone: +33-476765484, Fax: +33-476765664,
Citation Information. Clinical Chemical Laboratory Medicine. Volume 44, Issue 8, Pages 987–990, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: 10.1515/CCLM.2006.178, 01/08/2006
Publication History: Received: //; accepted: //; published online: 31/07/2006

Abstract

Background: Total plasma homocysteine has emerged as an independent risk factor for vascular disease. To meet increasing requests by clinicians for this homocysteine determination, a rapid assay for a routine use has been developed.

Methods: A robust, stable, isotope-dilution liquid chromatography tandem mass spectrometry (LC/MS/MS) method is described, including all the practical details and analytical performance results.

Results: The method allows homocysteine quantitation over a linear working range up to 100 μmol/L, with the limit of quantification estimated at a low value of 0.09 μmol/L. Total analytical imprecision is less than 4%. Accuracy was assessed by measuring the homocysteine concentration in a serum Standard Reference Material.

Conclusions: The method was demonstrated to be quick, reliable and cheap after 1 year of use on a time-shared instrument in our hospital unit.

Clin Chem Lab Med 2006;44:987–90.

Keywords homocysteine, HPLC, tandem mass spectrometry (MS/MS), routine practice

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