Title: Certification of Proteins in the Human Serum - Certified Reference Material ERM®- DA470k/IFCC
Authors: ZEGERS IngridSCHREIBER WiebkeSHELDON JoannaBLIRUP-JENSEN SorenMUNOZ PINEIRO AmaliaMERLINI GiampaoloITOH YoshihisaJOHNSON Andrew MyronTRAPMANN StefanieEMONS HendrikSCHIMMEL Heinz
Publisher: OPOCE
Publication Year: 2008
JRC Publication N°: JRC46604
ISBN: 978-92-79-09490-3
ISSN: 1018-5593
Other Identifiers: EUR 23431 EN
OPOCE LA-NA-23431-EN-C
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC46604
DOI: 10.2787/63869
Type: EUR - Scientific and Technical Research Reports
Abstract: The production and certification of ERM-DA470k/IFCC, a new serum protein reference material intended to replace ERM-DA470, is described. Serum was produced from blood collected in 6 blood collection centres according to a procedure ensuring that it was obtained from healthy donors, and that the lipid content of the serum was low. The serum was processed in 5 batches, and then pooled, spiked with B2M and CRP and filled into vials (1 mL serum per vial). The serum was lyophilised in the vials and afterwards closed with rubber stoppers and screw caps and stored at -70 °C. The stability and homogeneity of the material were assessed for 14 proteins, including CER and B2M. ERM-DA470k/IFCC was characterised for 12 proteins using the reference material ERM-DA470 as calibrant. This was achieved using a value transfer protocol that can be considered as reference procedure. The techniques used to measure the protein concentrations were immunonephelometry, immunoturbidimetry, and for ALB also visible spectrometry. The measurements were performed with different platform/reagent combinations (Abbott Architect, Beckman Immage, BN II and BN ProSpec, different Hitachi instruments, Roche Integra, LX 2200, and Olympus AU640). In total 18 laboratories participated in the value assignment, 4 using open value transfer procedures, 12 using closed value transfer procedures, and 2 using both open and closed procedures. The results show that open and closed value transfer procedures give very similar results, and lead to robust values for A2M, AAG, AAT, ALB, C3c, C4, HPT, IgA, IgG, IgM, TRF, and TTR.
JRC Institute:Institute for Reference Materials and Measurements

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