Bimodal copper oxide nanoparticles doped phase for the extraction of highly polar compounds by in-tube solid-phase microextraction coupled on-line to nano-liquid chromatography

Serra-Mora, Pascual; Herráez‐Hernández, R.; Campíns‐Falcó, P.

doi:10.1016/j.chroma.2019.460819

Cited by 20 publications

(5 citation statements)

References 56 publications

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“…The described methodology has been optimized to measure the target herbicides at low to sub µg/g levels, which are concentrations typically used in degradation studies. If lower concentrations need to be measured, the procedure would have to be modified to enhance the sensitivity, for example, by using a longer extractive capillary or a capillary with a modified extractive phase for IT-SPME [16,20]. In addition, the proposed method was only tested on four herbicides in a laboratory study.…”

Section: Discussionmentioning

confidence: 99%

“…In this regard, a great deal of attention has been devoted to the development of new sorbents for both SPME with fibers [14] and IT-SPME devices [9,[15][16][17][18]. For example, the use of capillaries coated with different types of nanoparticles has been proposed for the simultaneous analysis of herbicides of a wide range of polarities in water samples [19,20]. However, the number of studies that have focused on soil samples is still very limited [21].…”

Section: Introductionmentioning

confidence: 99%

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Assessing the Dissipation of Pesticides of Different Polarities in Soil Samples

Rodríguez-Palma,

Campíns-Falcó,

Herráez-Hernández

2024

Soil Systems

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A methodology has been developed to assess the presence and dissipation of herbicides of a wide range of polarities in soil using in-tube solid-phase microextraction (IT-SPME) coupled online to capillary liquid chromatography (capLC). The compounds investigated were tritosulfuron (TRT), triflusulfuron-methyl (TRF), aclonifen (ACL), and bifenox (BF), with log octanol-water partition coefficients (log Kow) ranging from 0.62 to 4.48. The method provided suitable linearity at concentration levels of 0.5–4.0 µg/g for TRT and TRF, and 0.2–1.0 µg/g for ACL and BF, and intra- and interday precision (expressed as relative standard deviation) ≤4% and ≤8%, respectively. The mean recoveries ranged from 90% to 101%, and the limits of detection (LODs) and quantification (LOQs) were in the intervals of 0.05–0.1 µg/g and 0.1–0.4 µg/g, respectively. The accuracy of the method was also satisfactory. The proposed approach was successfully applied to assess the degradation of the tested herbicides in different types of soil (agricultural, urban and forest) after being exposed to different laboratory and outdoor conditions. The results obtained showed a greater persistence of the most apolar compounds ACL and BF, with percentages of degraded herbicide ≤31% regardless of the soil characteristics. In contrast, a significant degradation of highly polar herbicides TRT and TRF was observed in soils with the lowest organic matter, even after a few days of exposure. For example, the percentages of remaining TRT and TRF in this kind of soil after 20 days were ≤65%; the half-life time of TRF was only 24.8 days. These results indicate that the proposed approach can be considered as an effective tool for a better understanding of soil pollution.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessing the Dissipation of Pesticides of Different Polarities in Soil Samples

Rodríguez-Palma,

Campíns-Falcó,

Herráez-Hernández

2024

Soil Systems

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“…This possibility was further investigated using different metal and metal oxide NPs, namely Ag and Au NPs of different sizes and cappings, and a variety of metal oxide NPs (TiO 2 , ZrO 2 , Al 2 O 3 , Fe 2 O 3 , ZnO, and CuO NPs) [56]. A TEOS-MTEOS polymer modified with SiO 2 NPs was also included for comparison purposes.…”

Section: Coatings Reinforced With Metal and Metal Oxide Npsmentioning

confidence: 99%

“…An additional advantage of the CuO TEOS-MTEOS phase is that it can be used in hydrophilic interaction chromatography (HILIC), which is the separation mode recommended for highly polar compounds. The utility of this bimodal extractive phase was demonstrated by determining the amino acids tyrosine and tryptophan under HILIC conditions, as a means of estimating the concentration of ovalbumin in wastewater samples [56].…”

Section: Coatings Reinforced With Metal and Metal Oxide Npsmentioning

confidence: 99%

Innovations in Extractive Phases for In-Tube Solid-Phase Microextraction Coupled to Miniaturized Liquid Chromatography: A Critical Review

et al. 2020

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Over the past years, a great effort has been devoted to the development of new sorbents that can be used to pack or to coat extractive capillaries for in-tube solid-phase microextraction (IT-SPME). Many of those efforts have been focused on the preparation of capillaries for miniaturized liquid chromatography (LC) due to the reduced availability of capillary columns with appropriate dimensions for this kind of system. Moreover, many of the extractive capillaries that have been used for IT-SPME so far are segments of open columns from the gas chromatography (GC) field, but the phase nature and dimensions are very limited. In particular, polar compounds barely interact with stationary GC phases. Capillary GC columns may also be unsuitable when highly selective extractions are needed. In this work, we provide an overview of the extractive capillaries that have been specifically developed for capillary LC (capLC) and nano LC (nanoLC) to enhance the overall performance of the IT-SPME, the chromatographic separation, and the detection. Different monolithic polymers, such as silica C18 and C8 polymers, molecularly imprinted polymers (MIPs), polymers functionalized with antibodies, and polymers reinforced with different types of carbon nanotubes, metal, and metal oxide nanoparticles (including magnetic nanoparticles), and restricted access materials (RAMs) will be presented and critically discussed.

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“…In this regard, a great deal of attention has been devoted to the development of new sorbents for both SPME with fibers [14] and IT-SPME devices [9,[15][16][17][18]. For example, the use of capillaries coated with different types of nanoparticles has been proposed for the simultaneous analysis of herbicides of a wide range of polarities in water samples [19,20]. However, the number of studies focused on soil samples is still very limited [21].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Dissipation of Pesticides of Different Polarities in Soil Samples

Rodríguez-Palma,

Campíns-Falcó,

Herráez-Hernández

2024

Preprint

View full text Add to dashboard Cite

A methodology has been developed to assess the presence and dissipation of herbicides of wide range of polarities in soil using in-tube solid phase microextraction (IT-SPME) coupled on-line to capillary liquid chromatography (capLC). The compounds investigated were tritosulfuron (TRT), triflusulfuron-methyl (TRF), aclonifen (ACL) and bifenox (BF), with log octanol-water partition coefficients (log Kow) ranging from 0.62 to 4.48. The linearity, recoveries, intra and interday precision, limits of detection (LODs) and quantification (LOQs), and accuracy of the method were established. The proposed approach was successfully applied assess the degradation of the tested herbicides in different types of soil (agricultural, urban and forest) after being exposed to different laboratory and outdoor conditions. The results obtained showed a greater persistence of the most apolar compounds ACL and BF, regardless of the soil characteristics, whereas a significant degradation of highly polar herbicides TRT and TRF was observed in soils with lowest organic matter even after a few days of exposure. Those results indicate that the proposed approach can be considered an effective tool for a better understanding of soil pollution.

show abstract

Bimodal copper oxide nanoparticles doped phase for the extraction of highly polar compounds by in-tube solid-phase microextraction coupled on-line to nano-liquid chromatography

Cited by 20 publications

References 56 publications

Assessing the Dissipation of Pesticides of Different Polarities in Soil Samples

Assessing the Dissipation of Pesticides of Different Polarities in Soil Samples

Innovations in Extractive Phases for In-Tube Solid-Phase Microextraction Coupled to Miniaturized Liquid Chromatography: A Critical Review

Assessing the Dissipation of Pesticides of Different Polarities in Soil Samples

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