title: Modification of the IFCC reference measurement procedure for determination of HbA 1c by HPLC-ESI-MS.
abstract: The reference measurement procedure for determination of HbA(1c) (glycated haemoglobin) using HPLC(high performance liquid chromatography)-ESI(electrospray ionisation)-MS(mass spectrometry) has been modified. Main modifications were a change in the buffer composition of the HPLC, a change in the gradient elution profile and the introduction of a post-column splitting system. The long-term stability of the HPLC-ESI-MS system proved to be of high importance to get reproducible results. Using the modified HPLC conditions stable retention times, high peak symmetry and a good column batch-to-batch reproducibility of the analytical results were obtained. The mean deviation from the target values was less than 0.7% with an imprecision of less than 2%.
authors.affiliation: Reference Measurement Laboratory, Instand e.V., Düsseldorf, Germany. kaiser@instand-ev.de
authors.forename: Patricia
authors.initials: P
authors.lastname: Kaiser
authors.forename: Theodorus
authors.initials: T
authors.lastname: Akerboom
authors.forename: László
authors.initials: L
authors.lastname: Dux
authors.forename: Hans
authors.initials: H
authors.lastname: Reinauer
references.citation: Clin Chem Lab Med. 2002 Jan;40(1):78-89
references.pmid: 11916276
references.citation: Clin Chem Lab Med. 1998 May;36(5):299-308
references.pmid: 9676387