Satellite Events

Title: Multi-residue analysis of modern pesticides in soil
Date: Sunday, June 16, 2019, 10 am to 16 pm
Conveners: Thomas D. Bucheli (Agroscope),
Eleni Karassali (Benaki Phytopathological Institute),
Daniel Wächter (Swiss Soil Monitoring Network)


Pesticides are applied worldwide in agriculture in considerable amounts to control pests, assure plant health and improve crop yield. A negative side effect of such uses is the unintended pollution of the environment, whichis nowadays monitored by law in many countries. Consequently, much effort has been spent on the simultaneous analysis of a large variety of modern pesticides at trace concentrations predominantly in aqueous matrices. In soil, such programs and corresponding analytical methods are still largely at their infancy (e.g. Hvezdova et al. 2018; Chiaia-Hernandez et al. 2017). This far, most methods are based on rather generic, QuEChERS-like approaches (e.g. Pszczolinska & Michel 2016), originally developed for pesticide analysis in vegetables and fruits (Anastassiades et al. 2003). In contrast, methods that are specifically established, optimized and validated for soils seem scarce. A brief literature review reveals that currently applied methods are largely disparate. Also, there seems to be a deficit in information exchange and collaboration between research groups, and a joint body under which they can unite, e.g. as part of IUPAC, ISO, or AOAC International, has, to the best of our knowledge, not been formed yet.

This workshop aims to bring together analytical chemists active in the field of (multi-) residue pesticide analysis in soil, with a view to initiate a platform to:
- Establish an overview of existing analytical approaches and methodologies (e.g. extraction procedures, extraction solvent selection, extract cleanup, separation & detection, matrix compensation)
- Identify challenges related to pesticide analysis in soils
- Explore the interest and need for sample exchange
- Initiate inter-laboratory comparison exercises to identify favorable methodologies
- In the coming years, possibly: harmonize methodologies and establish reference method(s)

These issues will be discussed by participants following a number of input-talks given by selected analytical chemists active in the field.

Note that the Satellite event primarily focusses on multi-residue analysis of modern pesticides at the trace concentration level, i.e., including more than one compound class, excluding methods that deal with legacy organochlorine pesticides, at least a dozen different target analytes, and concentrations in the µg/kg range.

Please register for participation in the Satellite Event via the online-platformand express your interest to contribute with an input-talk by upload of short abstract by January 15, 2019. For questions, please contact the conveners: thomas.bucheli@agroscope.admin.ch, e.karassali@bpi.gr, daniel.waechter@agroscope.admin.ch

References:

Anastassiades, M. et al. 2003 Fast and easy multiresidue method employing acetonitrile extraction/partitioning and "dispersive solid-phase extraction" for the determination of pesticide residues in produce. J. AOAC Intern. 86, 412-431.

Chiaia-Hernandez, A. C., et al. 2017 Long-Term Persistence of Pesticides and TPs in Archived Agricultural Soil Samples and Comparison with Pesticide Application. Environ. Sci. Technol. 51, 10642-10651.

Hvezdova, M., et al. 2018 Currently and recently used pesticides in Central European arable soils. Sci. Total Environ. 613-614, 361-370. Pszczolinska, K., Michel, M. 2016 The QuEChERS approach for the determination of pesticide residues in soil samples: An overview. J. AOAC Intern. 99, 1403-1414.