Matrix-matched standards in the liquid chromatography–mass spectrometry determination of neonicotinoids in soil and sediment

McManus, Michelle; Oates, Richard P.; Subbiah, Seenivasan; Klein, David; Cañas‐Carrell, Jaclyn E.

doi:10.1016/j.chroma.2019.05.035

Cited by 23 publications

(5 citation statements)

References 22 publications

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“…The comparisons between this proposed method and other analytical techniques for the analysis of neonicotinoid pesticides from the viewpoint of extraction solvent, LOD, and linear range were listed in Table S3. As can be seen, the extraction procedures reported were the same with LODs between 0.07 and 3.4 μg/kg, which were as low as those obtained with this proposed extraction method (between 0.2 and 0.5 μg/kg) [35][36][37][38]. These results showed that this ethanol-based QuEChERS method performed equally well in terms of these parameters for neonicotinoid pesticide residues.…”

Section: Comparison With Other Methodssupporting

confidence: 60%

Ethanol‐ammonium sulfate system based modified quick, easy, cheap, effective, rugged, and safe method for the determination of four neonicotinoid pesticide and metabolite residues in two canned fruits

Chen

Huang

et al. 2022

J of Separation Science

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As the pesticide and its metabolite residues in processed fruits could become a significant route of human exposure. The work presented herein focuses on developing a feasible quick, easy, cheap, effective, rugged, and safe method with improved extraction and cleanup system for the determination of imidacloprid, acetamiprid, thiamethoxam, and clothianidin (a metabolite of thiamethoxam) in canned fruits. The low toxic solvent ethanol was used to extract the analytes, and ammonium sulfate was used to promote phase separation. Moreover, the carboxylated multi‐walled carbon nanotube acted as the clean‐up sorbent for the removal of high solubility impurities. The proposed method was validated with fortified real samples at different concentration levels (20–200 μg/kg). Recoveries obtained from three spiked levels (20, 50, and 200 μg/kg) ranged from 74.9 to 86.4% with relative standard deviations of the intra‐day and inter‐day in the range of 0.8–5.5 and 2.0–7.1%, respectively. The limits of detection ranged from 0.2 to 0.5 and 0.2 to 0.6 μg/kg for orange and peach, respectively. The results demonstrated that the proposed method could be considered appropriate, and comparatively lower toxic for the analysis of neonicotinoid pesticide residues in canned fruit.

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Section: Comparison With Other Methodssupporting

confidence: 60%

Ethanol‐ammonium sulfate system based modified quick, easy, cheap, effective, rugged, and safe method for the determination of four neonicotinoid pesticide and metabolite residues in two canned fruits

Chen

Huang

et al. 2022

J of Separation Science

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“…Wildflower and bee samples were extracted based on a protocol outlined by McManus et al (2019), with modifications adjusting for sample mass. Bees were homogenized in the 20-ml vial in which they were collected, along with 3 ml of water:acetonitrile (33:66).…”

Section: Agrochemical Analysismentioning

confidence: 99%

Agrochemical occurrence on colocated wildflowers and wild bees collected near beef cattle feed yards and row crops

Peterson

Green

Subbiah

et al. 2021

Integr Envir Assess & Manag

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It is well established that agrochemicals can pose significant threats to native pollinators; however, relatively little is known about pollinator risks associated with agrochemicals that are used on beef cattle feed yards. Recently, feed yard-derived agrochemicals and those from row crop agriculture were quantified on wildflowers growing on the High Plains, USA. To better characterize pollinator risks on the High Plains, we collected colocated wildflowers and foraging bees across three field seasons for analytical determination of residual agrochemicals. Agrochemicals were detected and quantified on the majority of wildflowers (85%) and nearly half of bees (49%). Permethrin was the most frequently detected analyte on wildflowers (32%) and bees (17%). Flower hazard quotients and flower hazard indices were calculated to deterministically evaluate risk to foraging pollinators. Mean flower hazard quotients exceeded one for 5/16 analytes (31%), and flower hazard quotients calculated for 30% of wildflowers were greater than 50. Flower hazard quotients for clothianidin exceeded 400 for 14% of wildflowers, which portends conditions conducive to frequent bee mortalities. Flower hazard indices were greater on wildflowers from mid-July to mid-September as compared with wildflowers collected earlier in the summer, which coincides with row crop planting and increased prevalence of feed yard flies. Hazard quotients and hazard index values calculated from agrochemical residue data suggest that pollinators frequenting wildflowers near beef cattle feed yards and row crops on the High Plains are at risk from both individual sources, and more so when considered in combination.

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“…Now there are three main compared versions, one based on the original unbuffered method, and the other two used buffering agent to ensure more efficient extractions of pH-dependent analytes as well as less degradation of labile analytes [15]. However, the strong matrix interference may cause a lack of selectivity towards target compounds, so it's an imperative of further cleanup steps by utilizing sorbents such as C 18 , primary secondary amine (PSA) and graphitized carbon black (GCB) [16,17].…”

Section: Introductionmentioning

confidence: 99%

Establishment of a QuEChERS-UPLC-MS/MS Method for Simultaneously Detecting Tolfenpyrad and Its Metabolites in Tea

Wang

et al. 2022

Agronomy

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An analytical method simultaneously detecting pesticide and its metabolites, especially with higher toxicity, was urgently needed for supervision and safety evaluation of agricultural products. In the present study, a modified QuEChERS method coupled with a ultra-high performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) for simultaneous determination of tolfenpyrad (TFP) and its metabolites in tea matrices (fresh tea shoots, green tea, black tea, green tea infusion and black tea infusion) was established. The method validation showed good linearity (correlation coefficients ≥ 0.9945), accuracy (recoveries in 75.38–109.90%), sensitivity (limits of quantification ≤ 0.05 mg kg−1), and precision (relative standard deviations ≤ 19.09%). The established method was then applied to detect 40 market samples, resulting in 60.0% positive rate of TFP, besides, two metabolites including PT-CA, which is more toxic than the parent TFP, and PT-OH were also detected in the samples with high TFP residue(≥0.048 mg kg−1). The method established in the present work was thus of significant importance in comprehensive monitoring and of TFP in tea products.

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Matrix-matched standards in the liquid chromatography–mass spectrometry determination of neonicotinoids in soil and sediment

Cited by 23 publications

References 22 publications

Ethanol‐ammonium sulfate system based modified quick, easy, cheap, effective, rugged, and safe method for the determination of four neonicotinoid pesticide and metabolite residues in two canned fruits

Ethanol‐ammonium sulfate system based modified quick, easy, cheap, effective, rugged, and safe method for the determination of four neonicotinoid pesticide and metabolite residues in two canned fruits

Agrochemical occurrence on colocated wildflowers and wild bees collected near beef cattle feed yards and row crops

Establishment of a QuEChERS-UPLC-MS/MS Method for Simultaneously Detecting Tolfenpyrad and Its Metabolites in Tea

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