A Multilaboratory Commutability Evaluation of Proficiency Testing Material for Carbamazepine and Valproic Acid:A Study Within the Framework of the Dutch Calibration 2000 Project

Background: Medical laboratories are required to participate in interlaboratory comparisons of the analyses they perform. The materials used in these comparisons need to be of sufficient quality so that the comparison provides a picture of the performances. One of the main characteristics of the testing material is commutability, which is the ability of a material to yield the same numerical relationships between results of measurements as those relationships obtained when the same procedures are applied to patient samples. The aim of this study was to assess the commutability of 3 different m... Mehr ...