Title of article :
Validation of a headspace solid-phase microextraction procedure with gas chromatography-electron capture detection of pesticide residues in fruits and vegetables
Author/Authors :
Chai، نويسنده , , Mee Kin and Tan، نويسنده , , Guan Huat، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
7
From page :
561
To page :
567
Abstract :
Headspace solid-phase microextraction (HS-SPME) was evaluated for the determination of pesticide residues in fruits and vegetables by gas chromatography with an electron capture detector (GC-ECD). The fibre used was coated with polydimethylsiloxane (100 μm thickness) and the analytical conditions employed have been developed and optimised in a previous work [Chai, M. K., Tan, G. H., & Asha, L. (2008). Optimisation of headspace solid-phase microextraction for the determination of pesticide residues in vegetables and fruits. Analytical Sciences, 24 (2), 273–276]. The results show that the HS-SPME procedure gave a better linear range, accuracy, precision, detection and quantification limits and is adequate for analysing pesticide residues in fruits and vegetables. The average recoveries obtained for each pesticide ranged between 71% and 98% at three fortification levels with the relative standard deviation of less than 5%. Repeatability (0.3–3.7%) and intermediate precision (0.8–2.5%) were shown to be satisfactory. The limits of detection (0.01–1 μg L−1) and the limits of quantification (0.05–5 μg L−1) of these pesticides were much lower than the maximum residue levels (MRL), allowed for fruits and vegetables in Malaysia.
Keywords :
Hs-SPME , organophosphorous , Organochlorine , GC-ECD
Journal title :
Food Chemistry
Serial Year :
2009
Journal title :
Food Chemistry
Record number :
1959522
Link To Document :
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