Journal
TALANTA
Volume 84, Issue 1, Pages 141-147Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2010.12.041
Keywords
Gas chromatography/mass spectrometry; Negative chemical ionization; QuEChERS; Troublesome matrices; Pyrethroids; Isomerization
Categories
Funding
- National High-tech R&D Program of China (863 project) [2006AA10Z450]
- National Department Public Benefit Research Foundation [200810099, 200810219]
- National Basic Research Program of China (973 program) [2009CB421601, 2011CB911003]
- National Natural Science Fund of China [90913012, 20821063]
- Science Foundation of Jiangsu [BM 2007511]
Ask authors/readers for more resources
An analytical method with the technique of QuEChERS (quick, easy, cheap, effective, rugged and safe) and gas chromatography (GC)/mass spectrometry (MS) in negative chemical ionization (NCI) has been developed for the determination of 17 pyrethroid pesticide residues in troublesome matrices, including garlic, onion, spring onion and chili. Pyrethroid residues were extracted with acidified acetonitrile saturated by hexane. After a modified QuEChERS clean-up step, the extract was analyzed by GC-NCI/MS in selected ion monitoring (SIM) mode. An isotope internal standard of trans-cypermethrin-D(6) was employed for quantitation. Chromatograms of pyrethroids obtained in all these matrices were relatively clean and without obvious interference. The limits of detection (LODs) ranged from 0.02 to 6 mu g kg(-1) and recovery yields were from 54.0% to 129.8% at three spiked levels (20,40 and 60 mu g kg(-1) for chili, and 10, 20 and 30 mu g kg(-1) for others) in four different matrices depending on the compounds determined. The relative standard deviations (RSDs) were all below 14%. Isomerization enhancement of pyrethroids in chili extract was observed and preliminarily explained, especially for acrinathrin and deltamethrin. (C) 2011 Elsevier B.V. All rights reserved.
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