keyword
https://read.qxmd.com/read/37886892/chemical-profiling-of-botanical-extracts-obtained-in-nades-systems-using-centrifugal-partition-chromatography-combined-with-13-c-nmr-dereplication-hypericum-perforatum-as-a-case-study
#21
JOURNAL ARTICLE
Alexis Kotland, Joseph Thiery, Jane Hubert
INTRODUCTION: Natural deep eutectic solvents (NADES) have emerged as interesting extractants to develop botanical ingredients. They are nontoxic and biodegradable, nonflammable, easy to prepare, and able to solubilize a wide range of molecules. However, NADES extracts remain difficult to analyze because the metabolites of interest stay highly diluted in the nonvolatile viscous NADES matrix. OBJECTIVE: This study presents a robust analytical workflow for the chemical profiling of NADES extracts...
October 27, 2023: Phytochemical Analysis: PCA
https://read.qxmd.com/read/37867676/elucidating-the-structure-dynamics-and-interaction-of-a-choline-chloride-and-citric-acid-based-eutectic-system-by-spectroscopic-and-molecular-modeling-investigations
#22
JOURNAL ARTICLE
Md Ackas Ali, Md Abdul Kaium, Sayed Nesar Uddin, Md Jaish Uddin, Oluseyi Olawuyi, Albert D Campbell, Carl Jacky Saint-Louis, Mohammad A Halim
Eutectic solvent systems are versatile solvents that have found widespread use in numerous applications. Traditional solvents are homogeneous, having only one component, and their chemistry is relatively simple, with some exceptions. On the other hand, deep eutectic solvents (DESs) comprise binary components, generally a donor and an acceptor in hydrogen bonding with varying ratios. The interaction chemistry among the donor and acceptor involved in hydrogen bonding in DESs is complicated. Although numerous research is focused on the synthesis and application of DESs, few studies are reported to elucidate the complex structure and dynamic and interaction behavior of DESs...
October 17, 2023: ACS Omega
https://read.qxmd.com/read/37855170/surfactant-enhanced-air-agitation-liquid-liquid-microextraction-of-polycyclic-aromatic-hydrocarbons-from-edible-oil-using-magnetic-deep-eutectic-solvent-prior-to-hplc-determination
#23
JOURNAL ARTICLE
Fariba Adib, Mohammad Reza Afshar Mogaddam, Mahboob Nemati, Mir Ali Farajzadeh, Ali Mohebbi, Ali Akbar Alizadeh Nabil
Herein, an air-agitation liquid-liquid microextraction procedure was developed for the extraction of several polycyclic aromatic hydrocarbons from edible oil samples. In this study, the extraction procedure was achieved using a new magnetic deep eutectic solvent as the extraction solvent, in which there was no need for centrifugation. To enhance the rate of extraction of the analytes from the samples, the method was promoted by the use of surfactant addition. The extracted analytes were determined by high-performance liquid chromatography with a diode array detector...
October 19, 2023: Analytical Methods: Advancing Methods and Applications
https://read.qxmd.com/read/37818622/anion-dynamics-and-motional-decoupling-in-a-glycerol-choline-chloride-deep-eutectic-solvent-studied-by-one-and-two-dimensional-35-cl-nmr
#24
JOURNAL ARTICLE
Yannik Hinz, Joachim Beerwerth, Roland Böhmer
Chlorine-35 is among the few nuclides that provide an experimental handle on the anion dynamics in choline based deep eutectic solvents. By combining several nuclear magnetic resonance (NMR) techniques, the present work examines the Cl- motions within glyceline, a glycerol : choline chloride 2 : 1 solution, in a large temperature range down to the glass transition temperature T g . The applied methods include spin relaxometry, second-order line shape analysis, as well as two-dimensional central-transition exchange and stimulated-echo spectroscopy...
October 11, 2023: Physical Chemistry Chemical Physics: PCCP
https://read.qxmd.com/read/37776373/room-temperature-synthesis-of-imine-linked-magnetic-covalent-organic-polymers-in-deep-eutectic-solvents-for-the-extraction-of-flavonoids-and-their-determination-with-hplc-ms-ms
#25
JOURNAL ARTICLE
Yu Bian, Yuan Zhang, Tong Liu, Feng Zhang, Hui-Yuan Gao
A novel imine-linked magnetic covalent organic polymer, Fe3 O4 @TAB-TFPT, was synthesized using environmentally friendly deep eutectic solvents as the reaction medium instead of conventional organic solvents. The materials were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), FT-IR, N2 adsorption-desorption isotherms, energy dispersive spectrometer (EDS), X-ray photoelectron spectra (XPS), and thermo gravimetric analysis (TGA). Subsequently, the materials were employed as an adsorbent for magnetic solid-phase extraction (MSPE) of flavonoids, including Kurarinone, Norkurarinone, Xanthohumol, and Isoxanthohumol, prior to their determination by HPLC-MS/MS...
September 30, 2023: Mikrochimica Acta
https://read.qxmd.com/read/37762334/sm-co-magnetic-materials-a-recycling-strategy-using-modifiable-hydrophobic-deep-eutectic-solvents-based-on-trioctylphosphine-oxide
#26
JOURNAL ARTICLE
Nikita A Milevskii, Inna V Zinov'eva, Arina V Kozhevnikova, Yulia A Zakhodyaeva, Andrey A Voshkin
Hydrophobic deep eutectic solvents (HDES) are widely used as extractants. Usually, when preparing HDES, only the extraction ability of one component is taken into account, with the second serving as an "inert" component, whose effect on the extraction process is not taken into account. The present study demonstrates the possibility of controlling the selectivity of a hydrophobic deep eutectic solvent based on trioctylphosphine oxide (TOPO) by varying the substance that acts as a hydrogen bond donor, but which does not have an extractive ability...
September 13, 2023: International Journal of Molecular Sciences
https://read.qxmd.com/read/37739528/determination-of-bioactive-flavonoids-using-%C3%AE-cyclodextrin-combined-with-chitosan-modified-magnetic-nanoparticles
#27
JOURNAL ARTICLE
Xiaoping Hai, Lei Ma, Yun Zhu, Zhi Yang, Xiaofen Li, Minghong Chen, Mingwei Yuan, Huabin Xiong, Yuntao Gao, Feng Shi, Lina Wang
To accurately determine flavonoids (rutin, quercetin or kaempferol), it is necessary to extract them from complex matrices. The ultrasound-assisted magnetic dispersion microsolid phase extraction technique has been predominantly used for separation and enrichment of the target analytes. The combination of magnetic chitosan nanoparticles and a deep eutectic supramolecular solvent (DESP) is likely to enhance the efficiency of flavonoid extraction from food. In this study, adsorbents were prepared by modifying chitosan with magnetic nanoparticles, and the eluent was a DESP derived from β-cyclodextrin and an organic acid...
December 1, 2023: Carbohydrate Polymers
https://read.qxmd.com/read/37724473/solid-phase-extraction-of-gallic-acid-and-ascorbic-acid-in-fruits-using-polymerized-deep-eutectic-solvent-modified-substrate
#28
JOURNAL ARTICLE
Ali Zeraatkar Moghaddam, Elahe Arabi, Mehdi Shakourian-Fard
Aim: Novel substrates were synthesized by porous and nonporous polymerization of deep eutectic solvents on magnetic silica nanoparticles and introduced for dispersive solid-phase extraction of two analytes. Materials & methods: The prepared substrates were characterized, and an extraction procedure was implemented to select the best substrates and eluent. The central composite design acted to optimize the effects of parameters that influenced the extraction efficiencies. Results: For gallic and ascorbic acids, the limits of detection were obtained at 0...
September 19, 2023: Bioanalysis
https://read.qxmd.com/read/37717246/effervescent-tablet-assisted-deep-eutectic-solvent-based-on-magnetic-nanofluid-for-liquid-phase-microextraction-of-tyrosine-kinase-inhibitors-in-plasma-samples-by-high-performance-liquid-chromatography
#29
JOURNAL ARTICLE
Khosrou Abdi, Maryam Ezoddin, Laleh Adlnasab, Bahar Aziz Kabiri, Mohammad Ali Karimi, Somaye Behnamipour, Houman Alimoradi
BACKGROUND: Tyrosine kinase inhibitors (TKIs) are efficient anti-cancer drugs. The analysis of TKIs in the treatment of cancer is important to achieve the highest anti-cancer effects with minimal toxicities. Herein, we report an efficient effervescent tablet-assisted deep eutectic solvent based on nanofluid (ETA-DES-NF) combined with HPLC-UV for the determination of three anti-cancer drugs (erlotinib, imatinib, and nilotinib) in human plasma samples. METHODS: In this method, a magnetic nanofluid composed of deep eutectic solvent (DES) and Fe3 O4 @SiO2 nanoparticles was used as an extraction solvent...
September 17, 2023: Pharmacological Reports: PR
https://read.qxmd.com/read/37711576/an-efficient-deep-eutectic-magnetic-nano-gel-for-rapid-ultrasound-assisted-dispersive-%C3%A2%C2%B5-solid-phase-extraction-of-residue-of-tetracyclines-in-food-samples
#30
JOURNAL ARTICLE
Mahboube Shirani, Mohammad Faraji, Hamid Rashidi Nodeh, Behrouz Akbari-Adergani, Soheila Sepahi
UNLABELLED: In the present study, a magnetic nano gel as the sorbent which is the combination of octatonic acid: cumarin as eutectic solvent and Fe3 O4 @SiO2 was introduced as the sorbent in ultrasound-assisted dispersive µ-solid phase extraction process coupled with high performance liquid chromatography with photo diode array detector for simultaneous separation and determination of tetracyclines residues in food samples. FT-IR, SEM, VSM were used for the characterization of the synthetized magnetic nano gel...
November 2023: Journal of Food Science and Technology
https://read.qxmd.com/read/37703981/green-preparation-of-%C3%AE-chitins-from-squid-pens-by-using-alkaline-deep-eutectic-solvents
#31
JOURNAL ARTICLE
Jianhua Lv, Yaru Fang, Dazhi Wang, Mi Wu, Wenchang Zhang, Xiaoyu Ou, Huaiguo Li, Lei Shang, Zihong Li, Yan Zhao
Based on the assumption that protein could be removed by the combined mechanism of alkaline induced degradation and strong hydrogen bond interactions of deep eutectic solvents (DESs), β-chitins were successfully prepared from squid pens by using alkaline DESs formed by potassium carbonate and glycerol. The chemical structures of the DESs were investigated by 1 H nuclear magnetic resonance (1 H NMR), attenuated total reflection Fourier transform infrared (ATR-FTIR) and molecular modeling, and the physicochemical property of the prepared β-chitins were characterized...
September 11, 2023: International Journal of Biological Macromolecules
https://read.qxmd.com/read/37700066/deep-eutectic-solvents-based-on-l-arginine-and-2-hydroxypropyl-%C3%AE-cyclodextrin-for-drug-carrier-and-penetration-enhancement
#32
JOURNAL ARTICLE
Jianhua Lv, Pan Wu, Yaru Fang, Wenchang Zhang, Dongwen Liu, Mi Wu, Lei Shang, Huaiguo Li, Yan Zhao
By selecting L-arginine as the hydrogen bond acceptor (HBA) and 2-hydroxypropyl-β-cyclodextrin (2HPβCD) as the hydrogen bond donor (HBD), deep eutectic solvents (DESs) with various water content were prepared at the 4:1 mass ratio of L-arginine to 2HPβCD with 40 to 60% of water, and were studied for its application in transdermal drug delivery system (TDDS). The hydrogen bond networks and internal chemistry structures of the DESs were measured by attenuated total reflection Fourier transform infrared (ATR-FTIR) and 1 H-nuclear magnetic resonance spectroscopy (1 H-NMR), which demonstrated the successful synthesis of DESs...
September 12, 2023: AAPS PharmSciTech
https://read.qxmd.com/read/37690386/an-alginate-based-eutectogel-impregnated-with-polyvinylpyrrolidone-benzoic-acid-deep-eutectic-solvent-and-magnetic-carboxylated-multiwalled-carbon-nanotubes-evaluated-as-sorbent-in-green-microextraction-of-pesticides
#33
JOURNAL ARTICLE
Zeinab Asghari, Hassan Sereshti, Sara Soltani, Massoud Taghizadeh, Sajad Karami, Mehdi Esmaeili Bidhendi, Shahabaldin Rezania
This article presents the synthesis and application of a novel magnetic eutectogel constituting a polymeric deep eutectic solvent (PDES), carboxylated multiwall carbon nanotube (MWCNT-COOH), and super-dispersible/super-paramagnetic polyvinylpyrrolidone coated-Fe3 O4 nanocrystals incorporated in alginate gel. Different methods were used for the characterization of novel polymeric based DES gel including FT-NMR, ATR-FTIR, and SEM were used. The novel DES eutectogel was used for the extraction of pesticides from honey...
August 28, 2023: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://read.qxmd.com/read/37633040/deep-eutectic-solvents-in-sample-preparation-and-determination-methods-of-pesticides-recent-advances-and-future-prospects
#34
JOURNAL ARTICLE
Cong Hu, Jianan Feng, Yiqing Cao, Lizhu Chen, Yan Li
This review summarizes recent advances of deep eutectic solvents (DESs) in sample preparation and determination methods of pesticides in food, environmental, and biological matrices since 2019. Emphasis is placed on new DES categories and emerging microextraction techniques. The former incorporate hydrophobic deep eutectic solvents, magnetic deep eutectic solvents, and responsive switchable deep eutectic solvents, while the latter mainly include dispersive liquid-liquid microextraction, liquid-liquid microextraction based on in-situ formation/decomposition of DESs, single drop microextraction, hollow fiber-liquid phase microextraction, and solid-phase microextraction...
August 20, 2023: Talanta
https://read.qxmd.com/read/37581743/vortex-assisted-dispersive-liquid-liquid-microextraction-based-on-the-hydrophobic-deep-eutectic-solvent-based-ferrofluid-for-extraction-and-detection-of-myclobutanil
#35
JOURNAL ARTICLE
Yue Na, Xun Gao, Jiawei Hong, Xunyong Zhou, Ning Liang, Longshan Zhao
A vortex-assisted dispersive liquid-liquid microextraction (VA-DLLME) procedure using hydrophobic deep eutectic solvent-based ferrofluid (HDES-FF) as an extractant was established. The developed sample preparation method coupled with high-performance liquid chromatography-diode array detector (HPLC-DAD) was applied to the pretreatment and determination of myclobutanil (MYC) in fruit juice. Hydrophobic deep eutectic solvent, synthesized by n-decanoic acid and DL-menthol, was as a carrier and combined with magnetic nanoparticles (Fe3 O4 @OA) to form HDES-FF as an extractant with high extraction capacity...
August 15, 2023: Mikrochimica Acta
https://read.qxmd.com/read/37513333/co-2-capture-mechanism-by-deep-eutectic-solvents-formed-by-choline-prolinate-and-ethylene-glycol
#36
JOURNAL ARTICLE
Mingzhe Chen, Jinming Xu
The choline prolinate ([Ch][Pro]) as a hydrogen bond acceptor and ethylene glycol (EG) as a hydrogen bond donor are both used to synthesize the deep eutectic solvents (DESs) [Ch][Pro]-EG to capture CO2 . The CO2 capacity of [Ch][Pro]-EG is determined, and the nuclear magnetic resonance (NMR) and infrared (IR) spectrum are used to investigate the CO2 capture mechanism. The results indicate that CO2 reacts with both the amino group of [Pro]- anion and the hydroxyl group of EG, and the mechanism found in this work is different from that reported in the literature for the [Ch][Pro]-EG DESs...
July 17, 2023: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/37494993/preparation-of-water-insoluble-lignin-nanoparticles-by-deep-eutectic-solvent-and-its-application-as-a-versatile-and-biocompatible-support-for-the-immobilization-of-%C3%AE-amylase
#37
JOURNAL ARTICLE
Huan Zhang, Mingfu Nie, Zhenghua Gu, Yu Xin, Liang Zhang, Youran Li, Guiyang Shi
As one of the most abundant biopolymers, lignin is a widely available resource. However, its potential largely remains untapped, with most of it ending up as waste from industries like paper production, pulp processing, and bio-refining. The research undertaken in this study focused on the extraction of lignin from agroforestry waste using a deep eutectic solvent (DES) as a carrier for α-amylase immobilization, resulting in high stability and reusability. Several techniques, including Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), and the Brunauer-Emmett-Teller (BET) method were employed to examine the structure and morphology of both the extracted lignin and the immobilized enzyme...
July 24, 2023: International Journal of Biological Macromolecules
https://read.qxmd.com/read/37459925/determination-of-catechol-in-water-with-deep-eutectic-supramolecular-solvents-assisted-magnetic-%C3%AE%C2%BA-carrageenan-nanoparticles
#38
JOURNAL ARTICLE
Xiaoping Hai, Yun Zhu, Lei Ma, Zhi Yang, Xiaofen Li, Minghong Chen, Mingwei Yuan, Huabin Xiong, Yuntao Gao, Feng Shi, Lina Wang
A combination of magnetic κ-carrageenan nanoparticles and deep eutectic supramolecular solvents used for extraction of catechol from water was evaluated by the magnetic dispersion solid phase extraction method. The magnetic κ-carrageenan nanoparticles (KC@Fe3 O4 MNPs) and the deep eutectic supramolecular solvent (DESP) were characterised by 1 H NMR, FT-IR, XRD, SEM, VSM, TG, and BET. The adsorption kinetics, adsorption isothermal model, adsorption thermodynamics and effects of pH and salt concentration were investigated...
July 15, 2023: Chemosphere
https://read.qxmd.com/read/37426244/deep-eutectic-solvent-stir-bar-sorptive-extraction-a-rapid-microextraction-technique-for-the-determination-of-vitamin-d-3-by-spectrophotometry
#39
JOURNAL ARTICLE
Sayyed Hossein Hashemi, Massoud Kaykhaii, Ahmad Jamali Keikha, Leila Raisi
In this paper, a new microextraction method, named deep eutectic solvent stir bar sorptive extraction (DES-SBSE), is described that utilizes a hydrophobic DES (hDES) as a coating for SBSE. As a model, vitamin D3 was extracted efficiently by this technique from different real samples before its spectrophotometric determination. A conventional magnet was encapsulated inside a glass bar (1.0 cm × 2 mm) and coated by the hDES consisting of tetrabutylammonium chloride and heptadecanoic acid (mole ratio 1:2)...
July 4, 2023: ACS Omega
https://read.qxmd.com/read/37397198/magnetic-deep-eutectic-solvent-based-dispersive-liquid-liquid-microextraction-for-determination-of-strobilurin-fungicides-in-water-juice-and-vinegar-by-high-performance-liquid-chromatography
#40
JOURNAL ARTICLE
Min Wang, Luyao Zhao, Yu Niu, Shu Qin, Lixin Zhang, Liyan Jia, Xu Jing
In this study, a magnetic deep eutectic solvent coupled with dispersive liquid-liquid microextraction using high-performance liquid chromatography (MDES-DLLME-HPLC) was developed to detect strobilurin fungicides. The green hydrophobic MDES synthesized by methyltrioctylammonium chloride, ferric chloride, and heptanoic acid was used as an extraction solvent, which was dispersed by vortex and separated by an external magnetic field. The use of toxic solvents was avoided, and the separation time was reduced. The best experimental results were obtained through single factor and response surface optimization...
June 30, 2023: Food chemistry: X
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