Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 64, Issue 10, Pages 2145-2152Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.5b05437
Keywords
dispersive micro-solid phase extraction; zeolite; surfactant; carbamate; HPLC
Funding
- Thailand Research Fund
- Khon Kaen University [RSA5580004]
- Center for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education, and Materials Chemistry Research Center, Khon Kaen University
- Royal Golden Jubilee (RGJ) Ph.D. program [PHD/0082/2554]
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A vortex-assisted dispersive micro-solid phase extraction (VA-D-mu-SPE) based on cetyltrimethylammonium bromide (CTAB)-modified zeolite NaY was developed for preconcentration of carbamate pesticides in fruits, vegetables, and natural surface water prior to analysis by high performance liquid chromatography with photodiode array detection. The small amounts of solid sorbent were dispersed in a sample solution, and extraction occurred by adsorption in a short time, which was accelerated by vortex agitation. Finally, the sorbents were filtered from the solution, and the analytes were subsequently desorbed using an appropriate solvent. Parameters affecting the VA-D-mu-SPE performance including sorbent amount, sample volume, desorption solvent,and vortex time were optimized. Under the optimum condition, linear dynamic ranges were achieved between 0.004-24.000 mg kg(-1) (R-2 > 0.9946). The limits of detection (LODs) ranged from 0.004-4.000 mg kg(-1). The applicability of the developed procedure was successfully evaluated by the determination of the carbamate residues in fruits (dragon fruit, rambutan, and watermelon), vegetables (cabbage, cauliflower, and cucumber), and natural surface water.
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