Identification of pesticides in groundwater situated under greenhouse agriculture production and dropping irrigation, using GC/MS pulsed splitless injection

Kovacevik, Biljana and Zdravkovski, Zoran and Mitrev, Sasa (2017) Identification of pesticides in groundwater situated under greenhouse agriculture production and dropping irrigation, using GC/MS pulsed splitless injection. In: 17th CEEPUS International Symposium and Summer School on Bioanalysis, 02-08 July 2017, Ohrid, Republic of Macedonia.

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Abstract

The aim of this stady was to investigate the quality of groundwater situated under a topsoil where greenhouses and dropping irrigation system are used in tomato production. A GC-MS method was applied using pulsed splitless injection with pressure of 50 psi and purge flow to split vent of 1.5 minutes [1], for the screening of the most friquently used pesticides such as benalaxyl, chlorpyrifos, malathion, pirimifos methyl, methomyl, metribuzin, penconazole, triadimenol, pyrimethanil, and buprofezin. Seventy eight groundwater samples were collected from the region of Strumica, an agricultururally vulnerable area regarding pesticide application, during 2014 - 2015. Slightly modified liquid-liquid extraction was performed using dichloromethane as a solvent [2]. The obtained results show negligible pollution of groundwater with investigated pesticides. Only 5% of investigated samples were polluted with pesticides in concentrations which doesn’t exceed the national maximum concentration limit. The analysis showed the presence of pyrimethanil and chlorpyrifos in maximum concentrations of 0,0299 ± 0,00026 μg/l and 0,133 ± 0,00929 μg/l, respectively. The main reason for this negligible pollution of groundwater with pesticides is considered to be the use of greenhouses and the dropping irrigation system in agriculture production which doesn’t allow high quantity of water to be able to pass from the soil surface downward to the aquifers.

Item Type: Conference or Workshop Item (Poster)
Uncontrolled Keywords: GC/MS, pulsed splitless injection, pesticides, groundwater, dropping irrigation
Subjects: Natural sciences > Chemical sciences
Agricultural Sciences > Other agricultural sciences
Divisions: Faculty of Agriculture
Depositing User: Biljana Kovacevic
Date Deposited: 18 Dec 2017 14:11
Last Modified: 18 Dec 2017 14:11
URI: http://eprints.ugd.edu.mk/id/eprint/18677

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