期刊
TALANTA
卷 119, 期 -, 页码 268-275出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2013.11.007
关键词
Dispersive solid phase extraction; Polyaniline-coated magnetic microbowls; Pyrethroids; Tea drinks; Ultra fast liquid chromatography
资金
- National Natural Science Foundation of China [20727003, 21075049, 21105037]
- Program for New Century Excellent Talents in University [NECT-10-0443]
- Science and Technology Developing Foundation of Jilin Province [20100356, 20110162]
The polyaniline-coated magnetic particles with bowl-shaped morphology (Fe3O4/C/PANI microbowls) were successfully prepared and characterized by scanning electron microscopy, transmission electron microscopy and vibrating sample magnetometry. The prepared microbowls were used as the magnetic adsorbent in dispersive solid phase extraction of five pyrethroids, including cyhalothrin, beta-cypermethrin, esfenvalerate, permethrin and bifenthrin in plain tea drinks. The effects of experiment factors, including amount of Fe3O4/C/PANI microbowls, pH value, ultrasound extraction time and desorption conditions, were investigated. The extraction recoveries obtained with 8 mg of magnetic microbowls were satisfactory, and the microbowls can be reused after easy washing. Thus,,a simple, selective and effective method for the determination of the pyrethroids was established successfully. The results showed that the method had good linearity (r=0.9992-0.9998), and the limits of detections (LODs) were from 0.025 to 0.032 ng mL(-1). The intra-day and inter-day relative standard deviations (RSDs) were in the range of 2.4-6.1% and 3.5-8.8%, respectively. Recoveries obtained by analyzing the real tea drinks were in the range of 72.1-118.4%. (C) 2013 Elsevier B.V. All rights reserved.
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