4.3 Article

Determination of thiram residues in canola seeds, water and soil samples using solid-phase microextraction with polypyrrole film followed by ion mobility spectrometer

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/03067319.2014.983496

Keywords

soil; thiram; ion mobility spectrometry; canola seeds; polypyrrole; headspace solid-phase microextraction

Funding

  1. Research Council of Tarbiat Modares University

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Thiram fungicide contamination in canola seeds, water and soil samples was monitored using headspace solid-phase microextraction (HS-SPME) combined with ion mobility spectrometer (IMS) to assess its environmental relevance. The influence of the various analytical parameters on microextraction procedure including pH, ionic strength, equilibrium time and temperature has been evaluated and optimised. HS-SPME-IMS allowed the determination of thiram in the concentration range of 10-300ngmL(-1) (R-2>0.99). The detection limit and relative standard deviation were 6ngmL(-1) and 8% for five replicate analyses, respectively. The HS-SPME-IMS method with polypyrrole film doped with dodecylsulfate (PPy-DS) as solid phase provided an effective sample clean-up for the monitoring of thiram in canola and soil samples. The main advantages of this method are sensitive, good repeatability, organic solvent-free, less time-consuming and relatively inexpensive.

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