TITLE

Application of solid-phase microextraction for the determination of pyrethroid residues in vegetable samples by GC-MS

AUTHOR(S)
Beltran, J.; Peruga, A.; Pitarch, E.; López, F. J.; Hernández, F.
PUB. DATE
June 2003
SOURCE
Analytical & Bioanalytical Chemistry;Jun2003, Vol. 376 Issue 4, p502
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A solid-phase microextraction (SPME) method has been developed for the determination of 7 pyrethroid insecticides (bifenthrin, lambda-cyhalothrin, permethrin, cyfluthrin, cypermethrin, fenvalerate, and tau-fluvalinate) in water, vegetable (tomato), and fruit (strawberry) samples, based on direct immersion mode and subsequent desorption into the injection port of a GC/MS. The SPME procedure showed linear behavior in the range tested (0.5–50 μg L-1 in water and 0.01–0.1 mg kg-1 in tomato) with r2 values ranging between 0.97 and 0.99. For water samples limits of detection ranged between 0.1 and 2 μg L-1 with relative standard deviations lower than 20%. Detection limits for tomato samples were between 0.003 and 0.025 mg kg-1 with relative standard deviations around 25%. Finally, the SPME procedure has been applied to vegetable (tomato) and fruit (strawberry) samples obtained from an experimental plot treated with lambda-cyhalothrin, and in both cases the analyte was detected and quantified using a calibration curve prepared using blank matrix. SPME has been shown to be a simple extraction technique which has a number of advantages such as solvent-free extraction, simplicity, and compatibility with chromatographic analytical systems. Difficulties with the correct quantification in a complex matrix are also discussed.
ACCESSION #
15124590

 

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