Journal
FOOD ANALYTICAL METHODS
Volume 7, Issue 2, Pages 318-325Publisher
SPRINGER
DOI: 10.1007/s12161-013-9629-1
Keywords
Graphene; Magnetic nanocomposite; Triazole fungicides; Vegetables; Gas chromatography-mass spectrometry
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Funding
- National Natural Science Foundation of China [31171698]
- Scientific and Technological Research Foundation of Department of Education of Hebei Province [ZH2012012]
- Hebei Province Science and Technology Support Program [12396908D]
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A graphene-based magnetic nanocomposites (G-Fe3O4 MNPs) was synthesized and used as the adsorbent for the extraction of some triazole fungicides (triadimefon, paclobutrazol, hexaconazole, myclobutanil, diniconazole, propiconazole, and tebuconazole) in cucumber, cabbage, and tomato samples prior to gas chromatography-mass spectrometry detection. Various experimental parameters affecting the extraction efficiencies, such as the amount of G-Fe3O4 MNPs, extraction time, pH and salt concentration of the sample solution, and desorption conditions were investigated. Under the optimized experimental conditions, the enrichment factors of the method for the analytes were in the range from 461 to 697. The signal response was linear in the range of 0.5-35.0 ng g(-1) for all the analytes with the correlation coefficients ranging from 0.9810 to 0.9986. The limits of detection (S/N = 3) of the method for the analytes were between 0.01 and 0.10 ng g(-1). The recoveries of the method for the seven triazoles were in the range from 84.4 to 108.2 % with RSDs between 3.4 and 10.6 %.
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