Özet:

Pesticides are frequently utilized in the cultivation of agricultural products for human consumption to prevent / minimize the detrimental effects caused by pests and to keep the yield at the desired levels at harvest time. Besides the benefits of pesticides, unconscious use of pesticides causes the occurrence of different diseases. Monitoring the levels of pesticide residues is of vital importance for the environment, human, and other living organisms. In the present study, an analytical method was reported for the determination of mefenpyr-diethyl (MFD) as a member of the herbicide group by gas chromatography flame ionization detector (GC-FID) system with high accuracy and sensitivity. An in-column temperature program was established to effectively separate the analyte, and MFD was determined at a retention time of 5.2 min. The limit of detection (LOD), the limit of quantitation (LOQ), and the linear working range were found to be 0.01 mg/L, 0.04 mg/L, and 0.07-29.7 mg/L, respectively. The applicability of the determination method was investigated by recovery studies with barley, oat, and corn silk matrices. No analytical signal was recorded for MFD in blank samples of all three species. Recovery results close to 100% showed that MFD could be determined with high accuracy in barley, oat, and corn silk matrices.