期刊
JOURNAL OF SEPARATION SCIENCE
卷 41, 期 10, 页码 2221-2228出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201701325
关键词
liquid chromatography; magnetic solid-phase extraction; multiwalled carbon nanotubes; phenoxy acid herbicides; tandem mass spectrometry Institute
资金
- National Natural Science Foundation of China [21607039]
- Open Foundation for Key Laboratory of Analytical Chemistry for Biology Medicine (Wuhan University), Ministry of Education [ACBM2016004]
- Competitive Project Funds for Hubei Academy of Agricultural Science [2016jzxjh017]
Phenoxy acid herbicides are widely used herbicides that play an important role in improving the yield and quality of crops. However, some research has shown that this kind of herbicide is poisonous to human and animals. In this study, a rapid and sensitive method was developed for the detection of seven phenoxy acid herbicides in water samples based on magnetic solid-phase extraction followed by liquid chromatography and tandem mass spectrometry. Magnetic amino-functionalized multiwalled carbon nanotubes were prepared by mixing bare magnetic Fe3O4 nanoparticles with commercial amino-functionalized multiwalled carbon nanotubes in water. Then the amino-functionalized multiwalled carbon nanotubes were used to enrich phenoxy acid herbicides from water samples based on hydrophobic and ionic interactions. The effects of experimental variables on the extraction efficiency have been studied in detail. Under the optimized conditions, the method validation was performed. Good linearities for seven phenoxy acid herbicides were obtained with squared regression coefficients ranging from 0.9971 to 0.9989. The limits of detection ranged from 0.01 to 0.02 mu g/L. The method recoveries of seven phenoxy acid herbicides spiked at three concentration levels in a blank sample were from 92.3 to 103.2%, with inter- and intraday relative standard deviations less than 12.6%.
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