Journal
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
Volume 49, Issue 10, Pages 713-721Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03601234.2014.929478
Keywords
Carbamate pesticides; cryogel; graphene; pipette-tip extractor
Funding
- Higher Education Research Promotion
- National Research University Project of Thailand (NRU)
- Office of higher Education Commission
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education, Thailand
- Trace analysis and Biosensor Research Center (TAB-RC)
- Department of Chemistry, Faculty of Science and Graduate School Prince of Songkla University, Hat Yai, Songkhla, Thailand
Ask authors/readers for more resources
A novel pipette-tip extractor of a graphene/poly (vinyl alcohol) cryogel (graphene/PVA) composite sorbent was prepared to preconcentrate carbamate pesticides in environmental water samples before analysis with a gas chromatograph-flame ionization detector (GC-FID). This novel pipette-tip extractor with the graphene/PVA sorbent exhibited a high porosity when observed through a scanning electron micrograph (SEM). Under optimal conditions, using only 1.0 mL of sample and 0.75 mL of eluting solvent, the developed method provided a wide linear range of 10-700 ng mL(-1) and 10-500 ng mL(-1) with limit of detection (LOD) of 6.40 +/- 0.18 and 9.17 +/- 0.34 ng mL(-1) for carbofuran (2,3-dihydro-2,2-dimethylbenzofuran-7-yl methylcarbamate) and carbaryl (1-naphthyl methylcarbamate), respectively. The pipette-tip extractor provided high extraction efficiency with high accuracy indicated, by good recoveries in the range of 74.5 +/- 4.8% to 119.7 +/- 1.6% and 76 +/- 15% to 114 +/- 19% for carbofuran and carbaryl, respectively. In addition, the fabrication procedure showed a good pipette-tip extractor-to-pipette-tip extractor reproducibility with a relative standard deviation of 1.3-9.8% (n = 5). When the developed pipette-tip extractor was applied for the extraction of carbofuran and carbaryl in surface water samples near vegetable plantation areas, 25.9 +/- 8.2 ng mL(-1) of carbofuran was found, and carbaryl was also detected in concentrations that ranged from 45.0 +/- 4.0 to 191 +/- 13 ng mL(-1).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available