期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 408, 期 24, 页码 6823-6831出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-016-9809-0
关键词
Magnetic solid-phase extraction; Magnetic multi-walled carbon nanotubes; Ultra-high performance liquid chromatography-tandem mass spectrometry; Type A trichothecenes; Coix seed
资金
- Shanghai Agriculture Commission Project [3-2, 6-3-2]
- Shanghai Science and Technology Innovation Action Plan Project [15142201500]
- Shanghai Academy of Agricultural Sciences Zhu Pao Project
Magnetic solid-phase extraction (m-SPE) is a promising sample preparation approach due to its convenience, speed, and simplicity. For the first time, a rapid and reliable m-SPE approach using magnetic multi-walled carbon nanotubes (m-MWCNTs) as the adsorbent was proposed for purification of type A trichothecenes including T-2 toxins (T2), HT-2 toxins (HT-2), diacetoxyscirpenol (DAS), and neosolaniol (NEO) in coix seed. The m-MWCNTs were synthesized by assembling the magnetic nanoparticles (Fe3O4) with MWCNTs by sonication through an aggregation wrap mechanism, and characterized by transmission electron microscope. Several key parameters affecting the performance of the procedure were extensively investigated including extraction solutions, desorption solvents, and m-MWCNT amounts. Under the optimal sample preparation conditions followed by analysis with ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS), high sensitivity (limit of quantification in the range of 0.3-1.5 mu g kg(-1)), good linearity (R (2) > 0.99), satisfactory recovery (73.6-90.6 %), and acceptable precision (aecurrency sign2.5 %) were obtained. The analytical performance of the developed method has also been successfully evaluated in real coix seed samples.
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