Malachite green in freshwater fish in the Czech Republic

This paper presents the results of testing for residues of malachite green (MG) and its leucoform (LMG) in freshwater fish in the Czech Republic in the years 2012 – 2014 and a comparison with other EU states (results for 2012). A total of 260 samples of fish were tested. Thirty-two samples (12.31%) had a measurable concentration above the LOQ (the CC-alpha for MG and LMG is 0.3 μg·kg-1). Twelve samples (4.62%) failed to satisfy the minimum required performance limit of 2 μg·kg-1. Almost ninety-one percent of all of the samples in which a measurable concentration of MG/LMG was found were samples of fish from the Salmonid family (Salmonidae).