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Institut Mines-Télécom

Doctorant.e: Quantification des pesticides dans les dépôts atmosphériques : Origine et

Physical SciencesUpdated on Nov 14
Full-timeNo salary listed

About the Job

Responsibilities

  • Evaluate the dynamics of pesticide atmospheric deposition at different spatial and temporal scales in collaboration with the MERA observatory and AASQA organizations across France.
  • Adapt existing pesticide analysis methods using GC/MSMS and LC/MSMS, including integrating pesticides from the ANSES priority list and the LCSQA Pesticides programme.
  • Determine technical extraction methods for the molecules and quantify potential matrix effects and interferences caused by rainwater and dry deposition samples, using real samples spiked with absent molecules and labelled standards.
  • Analyze atmospheric deposition samples collected weekly for one year at several study sites and assess whether refrigeration during storage in the sampler is necessary.
  • Interpret results for occurrence, spatial and temporal variability, the influence of agricultural activity, relationships with meteorological conditions including air-mass trajectories, and correlations with other atmospheric pollutants or parallel ambient-air pesticide measurements.
  • Conduct technical tests to verify the conformity of atmospheric deposition collection instruments in Douai.
  • Modify existing GC/MSMS and LC/MSMS methods by removing or adding molecules and develop MSMS methods for new molecules.
  • Validate analytical methods, including detection and quantification limits, repeatability, and reproducibility.
  • Select sample preparation methods, including LLE, SPE, or SPME.
  • Evaluate interferences and matrix effects by spiking samples with deuterated standards and pesticide molecules absent from the samples, following preliminary presence/absence screening.
  • Manage weekly collected samples in Strasbourg, including receipt, extraction, analysis, and bottle conditioning.
  • Process analytical results, including data preprocessing, chromatogram integration, compound identification, quantification, and result validation with quality control.
  • Interpret acquired results in Douai.
  • Write publications and the doctoral thesis and present research internationally.
  • Participate, if applicable, in analytical chemistry teaching practicals for undergraduate courses at the University of Strasbourg, up to 64 hours per academic year.

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