Validation of user- and environmentally friendly extraction and clean-up methods for compound-specific stable carbon isotope analysis of organochlorine pesticides and their metabolites in soils

Ivdra, Natalija; Martín, Sara Herrero; Fischer, Anko

doi:10.1016/j.chroma.2014.06.014

Cited by 33 publications

(28 citation statements)

References 53 publications

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“…Water samples were extracted by solid-phase extraction (SPE) using SolEx C18 cartridges (Dionex ® , Sunnyvale, CA, USA) and an AutoTrace 280 SPE system (Dionex ® ) as described previously (Elsayed et al, 2014), and quantified by GC-MS/MS (S-met) and by LC-MS/MS (MESA and MOXA), as described previously (Elsayed et al, 2014). Pesticide extraction and purification for soils were adapted from Ivdra et al, (2014) and Anastassiades et al (2003). Environmental quantification limits for the soil samples were 0.001, 0.1, 0.1 mg/g dry weight (d.w.) for Smet, MOXA and MESA with an analytical uncertainty of 16%, 40% and 8% respectively.…”

Section: Pesticide Extraction and Quantificationmentioning

confidence: 99%

Pesticide degradation and export losses at the catchment scale: Insights from compound-specific isotope analysis (CSIA)

et al. 2018

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Although pesticides undergo degradation tests prior to use, determining their export, degradation and persistence under field conditions remains a challenge for water resource management. Compound specific isotope analysis (CSIA) can provide evidence of contaminant degradation extent, as it is generally independent of non-destructive dissipation (e.g., dilution, sorption, volatilization) regulating environmental concentrations. While this approach has been successfully implemented in subsurface environments, its application to pesticides in near-surface hydrological contexts at catchment scale is lacking. This study demonstrates the applicability of CSIA to track pesticide degradation and export at catchment scale and identify pesticide source areas contributing to changes in stable isotope signature in stream discharge under dynamic hydrological contexts. Based on maximum shifts in carbon stable isotope signatures (ΔδC  = 4.6 ± 0.5‰) of S-metolachlor (S-met), a widely used herbicide, we estimate maximum degradation to have reached 96 ± 3% two months after first application. Maximum shifts in nitrogen isotope signatures were small and inverse (ΔδN=-1.3±0.6‰) indicating potential secondary isotope effects during degradation. In combination with a mass balance approach including S-met main degradation products, total catchment non-destructive dissipation was estimated to have reached 8 ± 7% of the applied product. Our results show that CSIA can be applied to evaluate natural attenuation of pesticides at catchment scale. By providing a more detailed account of pesticide dissipation and persistence under field conditions we anticipate the contribution of pesticide CSIA to the improvement of regulatory and monitoring strategies.

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Section: Pesticide Extraction and Quantificationmentioning

confidence: 99%

Pesticide degradation and export losses at the catchment scale: Insights from compound-specific isotope analysis (CSIA)

et al. 2018

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“…Pesticides were extracted from the soil matrix following a solvent extraction procedure adapted from [39]. Briefly, an aliquot of soil sample (about 5 g) was placed in a 50 mL Falcon tube.…”

Section: Soil Extraction Proceduresmentioning

confidence: 99%

Enantiomer-specific stable carbon isotope analysis (ESIA) to evaluate degradation of the chiral fungicide Metalaxyl in soils

Masbou

Meite

Guyot

et al. 2018

Journal of Hazardous Materials

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“…16 Various analytical methods have been recently developed. [17][18][19][20][21][22][23][24][25][26][27][28][29] Nonetheless, application of CSIA of pesticides to field studies remain scarce 24,[30][31][32][33][34] because of two major challenges. First, isotope effect-free extraction and pre-concentration methods are required to allow CSIA at low environmentally relevant concentrations by gas chromatography-isotope ratio mass spectrometry (GC/IRMS) or -in the case of compounds like desphenylchloridazon for which GC/IRMS-based carbon isotope analysis does not work -by liquid chromatography-IRMS (LC/IRMS).…”

Section: Introductionmentioning

confidence: 99%

Solid-phase extraction method for stable isotope analysis of pesticides from large volume environmental water samples

Torrentó

Bakkour

Glauser

et al. 2019

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Validation of user- and environmentally friendly extraction and clean-up methods for compound-specific stable carbon isotope analysis of organochlorine pesticides and their metabolites in soils

Cited by 33 publications

References 53 publications

Pesticide degradation and export losses at the catchment scale: Insights from compound-specific isotope analysis (CSIA)

Pesticide degradation and export losses at the catchment scale: Insights from compound-specific isotope analysis (CSIA)

Enantiomer-specific stable carbon isotope analysis (ESIA) to evaluate degradation of the chiral fungicide Metalaxyl in soils

Solid-phase extraction method for stable isotope analysis of pesticides from large volume environmental water samples

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