The Effect of the Properties of Solvents of Various Dielectric Constants and Structures on the Photoionization of the Leucocarbinols and Leucocyanides of Malachite Green, Crystal Violet, and Sunset Orange and Related Phenomena

Abstract During the AOAC Annual Meeting held from September 30 to October 3, 2012 in Las Vegas, NV, the Expert Review Panel (ERP) on Veterinary Drug Residues reviewed data for the method for determination of residues of three triphenylmethane dyes and their metabolites (malachite green, leuco malachite green, crystal violet, leuco crystal violet, and brilliant green) in aquaculture products by LC/MS/MS, previously published in the Journal of Chromatography A 1218, 1632–1645 (2006). The method data were reviewed and compared to the standard method performance requirements (SMPRs) found in SMPR 2009.001, published in AOAC's Official Methods of Analysis, 19th Ed. (2012). The ERP determined that the data were acceptable, and the method was approved AOAC Official First Action. The method uses acetonitrile to isolate the analyte from the matrix. Then determination is conducted by LC/MS/MS with positive electrospray ionization. Accuracy ranged from 100.1 to 109.8% for samples fortified at levels of 0.5, 0.75, 1.0, and 2.0 μg/kg. Precision ranged from 2.0 to 10.3% RSD for the intraday samples and 1.9 to 10.6% for the interday samples analyzed over 3 days. The described method is designed to accurately operate in the analytical range from 0.5 to 2 μg/kg, where the minimum required performance limit for laboratories has been fixed in the European Union at 2.0 μg/kg for these banned substances and their metabolites. Upper levels of concentrations (1–100 μg/kg) can be analyzed depending on the different optional calibrations used.

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Photovoltaic and rectification properties of SnO2/malachite green + crystal violet dye/copper system

Journal of Materials Science Letters ◽

10.1007/bf00726814 ◽

1984 ◽

Vol 3 (3) ◽

pp. 271-274 ◽

Cited By ~ 2

Author(s):

G. D. Sharma ◽

A. K. Tripathi ◽

S. C. Mathur ◽

D. C. Dube

Keyword(s):

Malachite Green ◽

Crystal Violet ◽

Green Crystal ◽

Crystal Violet Dye

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Fast analysis of malachite green, leucomalachite green, crystal violet and leucocrystal violet in fish tissue based on a modified QuEChERS procedure

Chinese Journal of Chromatography ◽

10.3724/sp.j.1123.2014.01016 ◽

2014 ◽

Vol 32 (4) ◽

pp. 419 ◽

Cited By ~ 4

Author(s):

Chengyun ZHU ◽

Jie WEI ◽

Xuefang DONG ◽

Zhimou GUO ◽

Mingyang LIU ◽

...

Keyword(s):

Malachite Green ◽

Crystal Violet ◽

Fish Tissue ◽

Fast Analysis ◽

Green Crystal ◽

Modified Quechers ◽

Leucocrystal Violet ◽

Leucomalachite Green

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Coupling liquid-phase microextraction with paper spray for rapid analysis of malachite green, crystal violet and their metabolites in complex samples using mass spectrometry

Analytical Methods ◽

10.1039/c6ay01466f ◽

2016 ◽

Vol 8 (36) ◽

pp. 6651-6656 ◽

Cited By ~ 20

Author(s):

Ling Fang ◽

Jiewei Deng ◽

Yuan Yu ◽

Yunyun Yang ◽

Xiaowei Wang ◽

...

Keyword(s):

Mass Spectrometry ◽

Liquid Phase ◽

Malachite Green ◽

Crystal Violet ◽

Rapid Analysis ◽

Liquid Phase Microextraction ◽

Paper Spray ◽

Complex Samples ◽

Green Crystal

Coupling liquid-phase microextraction (LPME) with paper spray mass spectrometry (PS-MS) to analyze malachite green, crystal violet and their metabolites.

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