Monitoring of Pesticide Residues in Surface and Subsurface Waters, Sediments, and Fish in Center-Pivot Irrigation Areas

Rocha, Aderbal A.; Monteiro, Sérgio Henrique; Andrade, Graziela C. R. M.; Vilca, Franz Zirena; Tornisielo, Valdemar Luiz

doi:10.5935/0103-5053.20150215

Cited by 9 publications

(9 citation statements)

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“…Additionally, due to the small mass sorbent employed (150 mg), which is lower than habitual packed SPE cartridges [11,12,41] or even some FMM-based material [20], lower volumes of harmful organic solvents (2.5 mL THF) were required for sample elution, which was in agreement with the requirements of Green Analytical Chemistry.…”

Section: Comparison With Other Extraction Proceduressupporting

confidence: 57%

“…Concerning the LODs, most of these studies have been focused on the determination of CLO, in this sense, our LOD value was better than those reported using either SPE with conventional C18 cartridges [11,12] or DLLME [13]. However, the LOD achieved for this pesticide was higher than other sample pretreatments (such as LDS-VSLLME [9], HS-SPME [13] or SPE combined with DLLME [6]).…”

Section: Comparison With Other Extraction Proceduresmentioning

confidence: 51%

“…A significant strength of the proposed sorbent is its large reusability (see data above). In this regard, in the related studies of FMM-based materials or even in other extraction devices [17,18,20,6,11,12,41], this important parameter was not evaluated. This excellent reusability combined with the possibility of manufacturing several SPE cartridges (ca.…”

Section: Comparison With Other Extraction Proceduresmentioning

confidence: 99%

“…In order to enhance sensitivity, different pretreatment methods have been applied to the determination of OPPs in environmental water samples. Dispersive liquid-liquid microextraction (DLLME) [6][7][8][9] has been extensively applied, whereas SPE with C18-based material and solid-phase microextraction (SPME) [6,[10][11][12][13] are the most common techniques used for enrichment of these pesticides. However, these SPE methods have some disadvantages, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Extraction and preconcentration of organophosphorus pesticides in water by using a polymethacrylate-based sorbent modified with magnetic nanoparticles

et al. 2017

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A polymethacrylate-based sorbent modified with magnetic nanoparticles (MNPs) has been synthesized and used as sorbent for solid-phase extraction (SPE) and magnetic solid-phase extraction (MSPE) of three organophosphorus pesticides (phosmet, pirimiphos-methyl, and chlorpyrifos) in water samples followed by high-performance liquid chromatography-diode array detection. The sorbent was prepared from a glycidyl methacrylate-based polymer, modified with a silanizing agent, followed by immobilization of MNPs on the surface of the material. The sorbent was characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. Comparative studies of this support were done both in conventional SPE cartridge and MSPE approach. Several extraction parameters (loading pH, elution solvent, eluting volume, and loading flow rate) were investigated in detail. Under optimal conditions, the proposed sorbent gave an excellent enrichment efficiency of analytes and detection limits between 0.01 and 0.25 μg L. The recoveries of organophosphorus pesticides in spiked water samples were in the range of 71-98%, and the developed sorbent showed a high reusability (up to 50 uses without losses in recovery). The proposed method was satisfactorily applied to the analysis of these pesticides in water samples from different sources.

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Section: Comparison With Other Extraction Proceduressupporting

confidence: 57%

Section: Comparison With Other Extraction Proceduresmentioning

confidence: 51%

Section: Comparison With Other Extraction Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extraction and preconcentration of organophosphorus pesticides in water by using a polymethacrylate-based sorbent modified with magnetic nanoparticles

et al. 2017

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“…Hydroxylated polystyrene-divinylbenzene copolymer also gave poor recoveries for pirimicarb. Poor recoveries were observed for acephate, chlorpyrifos, and methamidophos in water with C18 SPE, although other OPs observed acceptable recoveries [48]. Graphene is a new SPE sorbent and performs slightly better than C18 or GCB for carbamates except for carbaryl which has lowest recovery of~55% attributed to stronger π-π interactions with graphene than other sorbents [98].…”

Section: Ideas and Applications Toward Sample Preparation For Food Anmentioning

confidence: 99%

Sample Preparation Methods for Pesticide Analysis in Food Commodities, Biological and Environment Matrices

Raina‐Fulton¹,

Xie²

2017

Ideas and Applications Toward Sample Preparation for Food and Beverage Analysis

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This chapter focuses on sample preparation procedures for pesticide analysis of food commodities, biological and environmental matrices. This will include pesticides with a broad range of polarity including those that are more amenable to gas chromatographymass spectrometry (organochlorines, organophosphorus pesticides, and pyrethroids) and those commonly analyzed by liquid chromatography-mass spectrometry (carbamates, azole, and strobilurin fungicides, and phenylureas as well as organophosphorus pesticides). QuEChERS (quick, easy, cheap, effective, rugged, and safe) methods or QuEChERS methods with modifications to allow wetting of the dry sample matrix, buffering, changing extraction solvent from acetonitrile to ethyl acetate are examined. Subsequent cleanup using dispersive solid phase extraction or cartridge format solid phase extraction has also been completed to reduce matrix effects. Other solid matrices are frequently extracted with pressurized liquid extraction, microwave assisted extraction, or ultrasonic extraction combined with or followed by dispersive solid phase extraction or solid phase extraction. Particularly for chromatography-mass spectrometry, careful consideration of matrix effects needs to be made when considering the design of the sample preparation procedures. Selection of extraction solvent needs to consider both polarity of target analytes (and their solubility in selected solvents) as well as co-extracted matrix components.

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Determination of multiclass pesticides in river sediments via matrix solid‐phase dispersion extraction and gas chromatography–tandem mass spectrometry

Mateus¹,

Vargas²,

Rodríguez

2022

Electrophoresis

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A fast and environment-friendly analytical method was implemented to determine multiclass pesticides in river sediments. Twenty-three pesticidesorganochlorine pesticides, organophosphorus pesticides, and triazines-were extracted via matrix solid-phase dispersion (MSPD) and analyzed by gas chromatography-tandem mass spectrometry (GC-MS/MS). Florisil demonstrated excellent analytes uptake capability as the extractant phase, with suitable selectivity for treating complex sediment samples. Under defined extraction conditions, the MSPD-GC-MS/MS method demonstrated robustness in the n interday analysis of sediments from different sources, providing limit of quantifications (LOQs) between 5 and 15 ng/g, linear responses in the range between LOQs and 150 ng/g, extraction recoveries of 71%-106%, and precision, assessed as relative standard deviation below 20%. The MSPD significantly reduced samples and solvents' consumption, providing critical environmental gains compared to traditional extraction methods like Soxhlet. Finally, the method was applied to analyze sediment samples from three different collection areas of the Subachoque River (Cundinamarca, Colombia), demonstrating a fast, efficient, confident, and profitable analytical tool for pollution control and monitoring in environmental samples. The method allowed us to determine the current use in Colombia of banned pesticides under the 2001 Stockholm Convention.

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Monitoring of Pesticide Residues in Surface and Subsurface Waters, Sediments, and Fish in Center-Pivot Irrigation Areas

Cited by 9 publications

References 0 publications

Extraction and preconcentration of organophosphorus pesticides in water by using a polymethacrylate-based sorbent modified with magnetic nanoparticles

Extraction and preconcentration of organophosphorus pesticides in water by using a polymethacrylate-based sorbent modified with magnetic nanoparticles

Sample Preparation Methods for Pesticide Analysis in Food Commodities, Biological and Environment Matrices

Determination of multiclass pesticides in river sediments via matrix solid‐phase dispersion extraction and gas chromatography–tandem mass spectrometry

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