Application of Different Extraction Methods for the Determination of Selected Pesticide Residues in Sediments

Abstract

Using several extraction methods including the QuEChERS approach, samples of both model and natural sediments were prepared. For the isolation of the target group of pesticides, two variants of two complementary extractions had to be used. Resulting extracts were analysed with LC/MS/MS. Selected methods furnishing the best results were validated in the terms of linearity and repeatability. Their limits of detection ranged from 0.1 to 2 ng/g, their limits of quantification from 1 to 6 ng/g and their recovery percentage varied between 46 % and 102 %.

QuEChERS sample preparation for the determination of pesticides and other organic residues in environmental matrices: a critical review

“…Cypermethrin and etofenprox are the only two pyrethroid derivatives extracted to date from sediments [79,80]. As previously discussed for the carbamate derivatives, the conditions used by Kvicalova only provided a 51% recovery for cypermethrin, whereas good recoveries (97%) were obtained for etofenprox without the re-hydration step or the pH control.…”

“…Four carbamate derivatives (propamocarb hydrochloride, oxamyl, phenmedipham and molinate) were extracted from sediments using the QuEChERS method [79,80]. The use of unbuffered extraction solvent to dry sediment allowed for obtaining surprisingly high recoveries for oxamyl (81%), propamocarb (93%) and molinate (99%) [80] in view of the fact that the sample was not rehydrated.…”

“…The use of unbuffered extraction solvent to dry sediment allowed for obtaining surprisingly high recoveries for oxamyl (81%), propamocarb (93%) and molinate (99%) [80] in view of the fact that the sample was not rehydrated. Although Kvicalova et al [79] compare several extraction conditions with varying pH, water and salt contents, recovery is not discussed in terms of these parameters. According to the data shown, phenmedipham can be extracted with a 60% recovery on a hydrated sediment using acidified acetonitrile and without a clean-up step.…”

Pesticide impact study in the peri-urban horticultural area of Gran La Plata, Argentina

“…In each sample, ATZ-D 5 was added as an internal quality standard at nominal concentration at the instrumental detection of 100 ng mL −1 . The multiresidue QuEChERS method was used for pesticide extraction (Anastassiades and Lehotay, 2003), using the modification proposed by Kvíčalová et al (2012), where 2 g of NaCl and 6 g of anhydrous MgSO 4 were used for extraction without buffer media. To the spiked sediment, 15 mL of acetonitrile were added and sonicated for 10 min, shaken for 1 min and sonicated again.…”

Assessing the ecological status of fluvial ecosystems employing a macroinvertebrate multi-taxon and multi-biomarker approach

“…It can also counterbalance the analytical challenges of nearly non-detectable levels of several PS in water, as a result of their hydrophobic nature (Dosis et al 2017). However, no directive has included EQS for pesticides in sediments (as well as soil or sludge) (Kvičalová et al 2012), even though the need to do it is recognised by the EU (EU 2013).…”