Journal
FOOD CHEMISTRY
Volume 139, Issue 1-4, Pages 246-252Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.01.112
Keywords
Multi-walled carbon nanotubes (MWCNTs); Hollow fibre; Solid-phase microextraction; Carbamates; HPLC-DAD; Apple analysis
Funding
- National Nature Science Foundation of China [21105106, 21075127]
- Natural Science Foundation of Gansu Province [1107RJZA146]
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An effective and sensitive method to determinate five carbamate pesticides in apples was developed by using carbon nanotubes-reinforced hollow fibre solid-phase microextraction (CNTs-HF-SPME) combined with high performance liquid chromatography-photodiode array detection (HPLC-DAD). The CNTs were dispersed in water via adding surfactant, and then were held in the pores of HE supported by capillary forces and sonification. The SPME device, which was wetted with 1-octanol, was placed in a stirred apple samples to extract target analytes. After extraction, analytes were desorbed and analyzed using HPLC-DAD. Under the optimized extraction conditions, the enrichment factors were achieved in the range from 49 to 308 with good inter-fibre repeatability and batch-to-batch reproducibility, while good linearity ranges and recoveries were obtained. The limits of detection ranged from 0.09 to 6.00 ng/g. Therefore, the results demonstrated that this novel method was an efficient pretreatment and enrichment procedure for the determination of trace carbamate pesticides in apples. (C) 2013 Elsevier Ltd. All rights reserved.
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