Community Research and Development Information Service - CORDIS

Abstract

A proficiency test was conducted with 68 laboratories from 17 EU Member States and four Third Countries. Test materials were one naturally contaminated "Ochratoxin A positive" and one "Ochratoxin A blank" capsicum material. The majority of laboratories chose to determine the ochratoxin A content by reverse-phase high-performance liquid-chromatography (RP-HPLC) with fluorescence detection against their own standard solutions as reference. Applying the modified Horwitz equation according to Thompson as a basis for the target standard deviation (22% in the case of this proficiency test), 79% of the laboratories achieved z-scores of less than 2. The results were evaluated further on the basis of the returned questionnaire that each participant received. The questions asked were focussed on the fact that future method development, if necessary, could be supported by comparison of the methodologies and method procedures applied.

Additional information

Authors: STROKA J, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);AMBROSIO M, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE);DONCHEVA I, European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Geel (BE)
Bibliographic Reference: EUR 23382 EN (2008), Free of charge
Availability: http://bookshop.europa.eu/is-bin/INTERSHOP.enfinity/WFS/EU-Bookshop-Site/en_GB/-/EUR/ViewPublication-Start?PublicationKey=LANA23382 (Catalogue Number: LA-NA-23382-EN-C)
ISBN: ISBN: 978-92-79-09075-2
Record Number: 200819984 / Last updated on: 2008-08-14
Category: PUBLICATION
Original language: en
Available languages: en