期刊
JOURNAL OF SEPARATION SCIENCE
卷 38, 期 5, 页码 858-863出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201401063
关键词
Herbicide residues; Tobacco; Ultraperformance convergence chromatography
资金
- Presidential Foundation of Zhengzhou Tobacco Research Institute [512012CA0080]
- Open Fund of State Key Laboratory of Electroanalytical Chemistry [SKLEAC201301]
- Fundamental Research Funds for Northwest A&F University of China [2014YB093, QN2013061]
A time-saving and organic solvent efficient method to simultaneously determine six kinds of herbicide residues in tobacco using solid-phase extraction for sample clean-up and preconcentration and the highly sensitive ultraperformance convergence chromatography method was developed. Parameters for ultraperformance convergence chromatography, including the choice of stationary phase and modifiers, autobackpressure regulator pressure, column temperature, and the flow rate of mobile solvents, were optimized. The herbicide residues of napropamide, alachlor, quizalofop-ethyl, diphenamid, metolachlor, and clomazone in tobacco samples were successfully separated and detected at levels as low as 0.00430.0086 mg/kg within 5min using a nonpolar high strength silica C18 selectivity for bases column and methanol as the cosolvent of the mobile phase of carbon dioxide (75-99.9%, v/v). Analysis of tobacco samples had recoveries of 69.8-95.0%, limit of quantitation of 0.0127-0.0245 mg/kg, limit of detection of 0.0043-0.0086 mg/kg, and correlation coefficient of >0.9990. Results support this method as an efficient alternative to current methodologies for the determination of herbicide residues in tobacco.
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