Confirmatory analysis of malachite green, Leucomalachite green, crystal violet and leucocrystal violet in salmon by liquid chromatography-tandem mass spectrometry

A.P.G. Dowling, P.P.J. Mulder, C. Duffy, L. Regan, M.R. Smyth

Research output: Contribution to journalArticleAcademicpeer-review

100 Citations (Scopus)

Abstract

A method has been developed to analyse for malachite green (MG), leucornalachite green (LMG), crystal violet (CV) and leucocrystal violet (LCV) residues in salmon. Salmon samples were extracted with acetonitrile:Mclllvain pH 3 buffer (90: 10 v/v), sample extracts were purified on a Bakerbond strong cation exchange solid phase extraction cartridge. Aliquots of the extracts were analysed by LC-MS/MS. The method was validated in salmon, according to the criteria defined in Commission Decision 2002/657/EC. The decision limit (CC alpha) was 0.17, 0.15, 0.35 and 0.17 mu g kg(-1), respectively, for MG, LMG, CV and LCV and for the detection capability (CCO) values of 0.30, 0.35, 0.80 and 0.32 mu g ka(-1), respectively, were obtained. Fortifying salmon samples (n = 6) in three separate assays, show the accuracy to be between 77 and 113% for MG, LMG, LCV and CV. The precision of the method, expressed as RSD values for the within-laboratory reproducibility, for MG, LMG and LCV at the three levels of fortification (1, 1.5 and 2.0 mu g kg(-1)), was less than 13%. For CV a more variable precision was obtained, with RSD values ranging between 20 and 25%. (c) 2006 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)411-419
JournalAnalytica Chimica Acta
Volume586
Issue number1-2
DOIs
Publication statusPublished - 2007

Keywords

  • pressure chemical-ionization
  • catfish ictalurus-punctatus
  • gentian-violet
  • rainbow-trout
  • triphenylmethane dyes
  • oncorhynchus-mykiss
  • leuco metabolites
  • visible detection
  • cell-lines
  • tissue

Fingerprint

Dive into the research topics of 'Confirmatory analysis of malachite green, Leucomalachite green, crystal violet and leucocrystal violet in salmon by liquid chromatography-tandem mass spectrometry'. Together they form a unique fingerprint.

Cite this