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Int. J. Environ. Res. Public Health 2016, 13(8), 814; doi:10.3390/ijerph13080814

Quantitative Detection of Trace Malachite Green in Aquiculture Water Samples by Extractive Electrospray Ionization Mass Spectrometry

1
Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China Institute of Technology, Nanchang 330013, China
2
Department of Electronic and Information Engineering, Harbin Institute of Technology, Weihai 264209, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Warish Ahmed and David J. Beale
Received: 8 May 2016 / Revised: 24 July 2016 / Accepted: 5 August 2016 / Published: 11 August 2016
View Full-Text   |   Download PDF [1990 KB, uploaded 11 August 2016]   |  

Abstract

Exposure to malachite green (MG) may pose great health risks to humans; thus, it is of prime importance to develop fast and robust methods to quantitatively screen the presence of malachite green in water. Herein the application of extractive electrospray ionization mass spectrometry (EESI-MS) has been extended to the trace detection of MG within lake water and aquiculture water, due to the intensive use of MG as a biocide in fisheries. This method has the advantage of obviating offline liquid-liquid extraction or tedious matrix separation prior to the measurement of malachite green in native aqueous medium. The experimental results indicate that the extrapolated detection limit for MG was ~3.8 μg·L−1 (S/N = 3) in lake water samples and ~0.5 μg·L−1 in ultrapure water under optimized experimental conditions. The signal intensity of MG showed good linearity over the concentration range of 10–1000 μg·L−1. Measurement of practical water samples fortified with MG at 0.01, 0.1 and 1.0 mg·L−1 gave a good validation of the established calibration curve. The average recoveries and relative standard deviation (RSD) of malachite green in lake water and Carassius carassius fish farm effluent water were 115% (6.64% RSD), 85.4% (9.17% RSD) and 96.0% (7.44% RSD), respectively. Overall, the established EESI-MS/MS method has been demonstrated suitable for sensitive and rapid (<2 min per sample) quantitative detection of malachite green in various aqueous media, indicating its potential for online real-time monitoring of real life samples. View Full-Text
Keywords: extractive electrospray ionization; rapid detection; malachite green; water; mass spectrometry extractive electrospray ionization; rapid detection; malachite green; water; mass spectrometry
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Fang, X.; Yang, S.; Chingin, K.; Zhu, L.; Zhang, X.; Zhou, Z.; Zhao, Z. Quantitative Detection of Trace Malachite Green in Aquiculture Water Samples by Extractive Electrospray Ionization Mass Spectrometry. Int. J. Environ. Res. Public Health 2016, 13, 814.

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