by icia icia

Objectives:
Chlorpyrifos [O,O-diethyl O-(3,5,6-trichloro-2-pyridinyl)-phosphorothioate] is one of the most widely used organophosphate pesticides. Its massive application has led to the contamination of water and soil, and disruption of biogeochemical cycles, resulting in a risk to the ecological balance.

OBJECTIVES The general objective of the project is to study the distribution of chlorpyrifos in water, sediment and organisms, and migration of chlorpyrifos in surface water samples using „green” analytical methods

Specific objectives:

  • development, implementation and validation of rapid, “green” ecological, advanced and cost-effective analytical methods for the extraction of chlorpyrifos from surface water, sediment and organisms: Solid Phase Extraction (SPE) and Solid Phase Microextraction (SPME), prior to quantitative determination;
  • use of high performance chromatographic techniques: gas chromatography coupled with mass spectrometry (GC-MS), gas chromatography with electron capture detection (GC-ECD);
  • determination of chlorpyrifos levels in surface water, sediment and organisms samples;
  • assessment of the migration, distribution, accumulation, persistence and transformation (metabolism) of chlorpyrifos in surface water in the studied areas;
  • results disseminated by scientific papers and conference presentations;
  • patent proposal for the ”green” analytical methods.
DESCRIPTION Chlorpyrifos [O,O-diethyl O-(3,5,6-trichloro-2-pyridinyl)-phosphorothioate] is one of the most widely used organophosphate pesticides. Its massive application has led to the contamination of water and soil, and disruption of biogeochemical cycles, resulting in a risk to the ecological balance. Because chlorpyrifos is present in the environment at trace levels, it is necessary to use very selective extractions and sensitive quantitative analysis methodologies. The project MIRYOS aims to be a response to the problems related to classical techniques of sample preparation, laborious, time and reagent consuming. The project would assure also the improvement of analytical methods for determination of chlorpyrifos in environmental samples, by elaboration, development, implementation and validation of “green” methods, such as Solid Phase Extraction (SPE) and Solid Phase Microextraction (SPME), which are rapid, cost-effective and very selective, and also instrumental techniques, such as gas chromatography with electron capture detection (GC-ECD) and gas chromatography with mass spectrometry (GC-MS). The proposed project will ensure the mutual use of special laboratory equipment and instruments existing within the Laboratory for Environmental Analysis (LAM) of ICIA and Laboratory of Environmental Chemistry Ecotoxicology of Chinese partner, where the project teams will develop the new envisaged methods.
RESULTS ESTIMATED
  • developed and validated „green” method for determination of chlorpyrifos in water samples;
  • developed and validated „green” method for determination of chlorpyrifos in solid samples (sediment, aquatic organisms);
  • water, sediment, aquatic organisms samples collected;
  • chlorpyrifos concentration determined in water, sediment and aquatic organisms samples;
  • study of distribution, migration and transformation of chlorpyrifos in aquatic environment;
  • patents proposal;
  • results disseminated by scientific papers and conference presentations.
RESULTS OBTAINED
Stage I
  • developed and validated „green” method for determination of chlorpyrifos in water samples (SPE/SPME-GC-ECD);
  • developed and validated „green” method for determination of chlorpyrifos in sediment samples (SPE/SPME-GC-ECD);
  • water, sediment and aquatic organisms samples collected;
  • patent proposal;
  • results dissemination at national symposium.
Other Informations
Attached documents: