期刊
TALANTA
卷 162, 期 -, 页码 300-308出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2016.10.042
关键词
Methylamine modified graphene; Neonicotinoid insecticide; Solid phase extraction; Ultra high performance liquid chromatography tandem mass spectrometry; Sunflower seed
资金
- Natural Science Foundation of Hebei Province China [B2013201234]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry of China [47]
In this paper, methylamine modified graphene (CH3NH-G) was synthesized and used as solid-phase extraction (SPE) sorbent to cleanup the acetonitrile extract of sunflower seeds for the determination of neonicotinoid insecticides by UPLC-MS/MS. The effects of the type of extraction solvent, pH, the amount of CH3NH-G sorbent as well as the type and volume of eluent on the extraction efficiency were evaluated. Good linearity was obtained for the analytes with coefficient of determination (R-2) in the range of 0.9986-0.9998. LOD (S/N=3) and LOQ (S/N=10) were below 6 and 20 ng kg(-1), respectively. Method recoveries were between 74.3% and 119.1%. Relative standard deviations (RSD) for eight replicate determinations were in the range of 1.7-2.9%. The proposed method has been applied to the analysis of 3 kinds of sunflower seed samples from local market.
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