Journals / Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2018 / Cilt: 8 - Sayı: 1
Method Development and Validation for the Determination of Pesticide Residues in Water by GC-NPD
- Pages
- 133–141
- DOI
- —
Abstract
A multi-residue method was developed for the determination of organophosphorous pesticides andHerbicide by liquid-liquid extraction (LLE) and followed by gas chromatography-nitrogen-phosphorus detector(GC/NPD). The method was evaluated with respect to the limit of detection and quantification, linearity and accuracy(repeatability, reproducibility, recovery). The method is linear over the range 2.5 -25 μg L-1 for eleven pesticidesand 5-25 μg L-1 for methamidophos. Correlation coefficients were higher or equal to 0.992. The limits of detection(LODs) were between 0.67 and 2.23 μg L-1. The limits of quantification (LOQs) ranged from 2.24 and 7.45 μg L-1.Recoveries of fortified water samples in two different concentration levels with 12 organophosphorous pesticidesand herbicide were over 95% in high concentration and 80% in low concentration. For repeatability, relative standarddeviation (RSD%) ranged between 2.79 and 10.99%, and for reproducibility (RSD%) ranged between 1.56and 10.36 %. The developed method is suitable for routine application in water samples in accordance with thevalidation data and the parameter as the high sample throughput and cost effective.
Özet
Organik fosforlu pestisitlerin ve herbisitlerin sıvı-sıvı ekstraksiyonu (LLE) ve ardından gaz kromatografisiazot-