Bulletin of the IDF N° 477/ 2014: Determination of hen’s egg white lysozyme in milk and cheese -Interlaboratory collaborative studyBulletin of the IDF No. 477/2014
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This article presents the results of an international collaborative study conducted to validate previous
technical specifications for the measurement of lysozyme in cheese. The work proposes minor modifications
to the method, which will be published as an international standard (ISO 27105|IDF 216) for the
determination of hen’s egg white lysozyme in milk and milk products by HPLC.
The method is suitable for measuring low levels of hen’s egg white lysozyme with a quantification limit of
10 mg/kg. The repeatability is 8.4% (95% CI: 6.7–9.3%) and the reproducibility 34.7% (95% CI: 20.8–59.0%).
Keywords: Cheese, Detection, Egg white, HPLC, Lysozyme, Milk, Validation
Bulletin of the IDF No. 477/2014
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