Determination of eight pesticides of varying polarity in surface waters using solid phase extraction with multiwalled carbon nanotubes and liquid chromatography-linear ion trap mass spectrometry

Dahane, S.; García, Miguel de Cara; Moreno, Ana Uclés; Galera, M. Martı́nez; Viciana, María del Mar Socías; Derdour, Aïcha

doi:10.1007/s00604-014-1290-x

Cited by 25 publications

(4 citation statements)

References 30 publications

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“…In a recent study [49] using Multi-Walled Carbon Nanotubes (MWCNTs) as SPE sorbent for the pre-concentration of drugs with acid-base properties in river and wastewater, it was found that the pH of the sample affected the recovery and the best recoveries for most analytes were obtained at a pH value of 8 (Figure 4). In other similar work [52] we also used MWCNTs as SPE sorbent for the pre-concentration of pesticides in surface water, and similar recoveries were obtained in the pH range 3 to 7, except for methomyl which showed better recoveries at pH 5. Therefore, pH 5 was selected as the optimum pH to adjust the water sample.…”

Section: Solid-phase Extraction Optimizationmentioning

confidence: 58%

“…Generally, the water solubility of hydrophobic organic compounds decreases with increasing salt concentration, which is likely to increase their retention on the SPE sorbent [53]. This effect is called "salting out" and it can be explained by the engagement of water molecules in the hydration spheres around the ionic salt and hence in the reduction of the water concentration available to dissolve the analytes [52,54].…”

Section: Solid-phase Extraction Optimizationmentioning

confidence: 99%

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Silica Based Mesoporous Materials as Sorbents for Solid-Phase Extraction of Organic Pollutants in Water

Dolores Gil García,

Martínez Galera,

Jesús Martínez Bueno

2024

Environmental Sciences

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Since the first applications of solids with adsorbent properties in water treatment, Solid-Phase Extraction (SPE) has been the most suitable sample preparation technique for the determination of organic pollutants in water. In the last decades, numerous articles have appeared in the literature describing a wide variety of SPE sorbents. Attention in this field has focused on the search for new SPE materials capable of extracting a wide variety of pollutants from water. However, each sorbent has advantages for certain compounds, but not when it is used with others. Thus, conventional sorbents showed poor performance for most high polarity analytes. Recently, mesoporous materials are attracting increasing interest in sample preparation due to their desirable characteristics. They present unique advantages as highly ordered and size-controlled mesoporous structures, high surface areas and large pore volumes, good performance in thermal and chemical stability, compositional controllability and flexibility for functionalization.

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Section: Solid-phase Extraction Optimizationmentioning

confidence: 58%

Section: Solid-phase Extraction Optimizationmentioning

confidence: 99%

Silica Based Mesoporous Materials as Sorbents for Solid-Phase Extraction of Organic Pollutants in Water

Dolores Gil García,

Martínez Galera,

Jesús Martínez Bueno

2024

Environmental Sciences

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“…These results were in agreement with ref. . However, when adding 20% toluene as a protective agent, only enrichment factors of carbaryl and chlorbenzuron were improved, while others were invariant.…”

Section: Resultsmentioning

confidence: 96%

Rapid analysis of pesticide residues in drinking water samples by dispersive solid‐phase extraction based on multiwalled carbon nanotubes and pulse glow discharge ion source ion mobility spectrometry

Zou

Liu

et al. 2016

J of Separation Science

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An analytical method based on dispersive solid-phase extraction with a multiwalled carbon nanotubes sorbent coupled with positive pulse glow discharge ion mobility spectrometry was developed for analysis of 30 pesticide residues in drinking water samples. Reduced ion mobilities and the mass-mobility correlation of 30 pesticides were measured. The pesticides were divided into five groups to verify the separation capability of pulse glow discharge in mobility spectrometry. The extraction conditions such as desorption solvent, ionic strength, conditions of adsorption and desorption, the amounts of multiwalled carbon nanotubes, and solution pH were optimized. The enrichment factors of pesticides were 5.4- to 48.7-fold (theoretical enrichment factor was 50-fold). The detection limits of pesticides were 0.01∼0.77 μg/kg. The linear range was 0.005-0.2 mg/L for pesticide standard solutions, with determination coefficients from 0.9616 to 0.9999. The method was applied for the analysis of practical and spiked drinking water samples. All results were confirmed by high-performance liquid chromatography with tandem mass spectrometry. The proposed method was proven to be a commendably rapid screening qualitative and semiquantitative technique for the analysis of pesticide residues in drinking water samples on site.

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“…CNTs have been used in analytical chemistry and separation science as a novel adsorbent for SPE . CNTs show high extraction potential for various organic and inorganic compounds from nonpolar to highly polar . Interaction between organic molecules and CNTs depends on physicochemical properties of CNTs, structure of organic molecules, and properties of sample solution .…”

Section: Introductionmentioning

confidence: 99%

Solid-phase extraction disk based on multiwalled carbon nanotubes for the enrichment of targeted pesticides from aqueous samples

et al. 2017

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A sensitive method for the determination of six varying polarity pesticides (imidacloprid, acetamiprid, carbendazim, simazine, linuron, and tebufenozide) based on a solid-phase extraction disk with multiwalled nanotubes is proposed.A dispersion of multiwalled nanotubes in a surfactant aqueous solution (Triton X-100) was used for the preparation of the solid-phase extraction disk. The effect of surfactant on the functional groups of multiwalled nanotubes was examined by applying temperature-programmed desorption. It was found that this treatment increased the amount of oxygen groups of treated multiwalled nanotubes comparing with untreated ones. The factors that may influence the adsorption and recovery such as the kind and volume of eluent, volume, flow rate and pH of sample were investigated and optimized. Under the optimized conditions, the maximal enrichment factors for low polar pesticides are ranging from 4000 to 4985 and for more polar are 2250 and 2750. The linear range of calibration curves was 10-500 ng/L with correlation coefficient higher than 0.9960, and the detection limit was 6.2-23.7 ng/L. Finally optimized method was applied for determination trace level of five out of six pesticides in tap and river water samples with good recovery.

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Determination of eight pesticides of varying polarity in surface waters using solid phase extraction with multiwalled carbon nanotubes and liquid chromatography-linear ion trap mass spectrometry

Cited by 25 publications

References 30 publications

Silica Based Mesoporous Materials as Sorbents for Solid-Phase Extraction of Organic Pollutants in Water

Silica Based Mesoporous Materials as Sorbents for Solid-Phase Extraction of Organic Pollutants in Water

Rapid analysis of pesticide residues in drinking water samples by dispersive solid‐phase extraction based on multiwalled carbon nanotubes and pulse glow discharge ion source ion mobility spectrometry

Solid-phase extraction disk based on multiwalled carbon nanotubes for the enrichment of targeted pesticides from aqueous samples

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