extraction liquide carbamate

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Efficient Extraction and Determination of Carbamate Pesticides
2022.2.8 •. Simulation calculations showed H-bonding facilitates the adsorption of TpDB towards the carbamate pesticides. •. A highly sensitive HPLC-UV method was developed for the determination of trace carbamate pesticides in vegetables. •. The method exhibits a wide linear range, low LODs and good recovery. Abstract.
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Cloud-point extraction and reversed-phase high
2009.2.26 A cloud-point extraction (CPE) method using Triton X-114 non-ionic surfactant was developed for the extraction and preconcentration of carbamate insecticide residues (i.e., methomyl, propoxur, carbofuran, carbaryl, isoprocarb, and promecarb) in
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CO2-Based Alkyl Carbamate Ionic Liquids as Distillable Extraction ...
2014.5.19 A series of alkyl carbamate ionic liquids have been prepared from CO2 and an amine in order to provide a range of solvent properties for natural product extraction. CO2-Based Alkyl Carbamate Ionic Liquids as Distillable Extraction Solvents ACS Sustainable Chemistry Engineering
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Magnetic Solid-Phase Extraction of Carbamate
2022.3.30 Magnetic Solid-Phase Extraction of Carbamate Pesticides Using Magnetic Metal–Organic Frameworks Derived from Benzoate Ligands, Followed by Digital Image Colorimetric Screening and High
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Determination of ethyl carbamate in spirits using
In this work, a simple methodology was developed for the determination of ethyl carbamate (EC) in spirits by high performance liquid chromatography with fluorimetric detection. The sample is subjected to salting-out
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Application of liquid/liquid extraction in determination of
Application of liquid/liquid extraction in determination of ethyl carbamate in liquor. Li Yuanzi, Huang Shiyong, +3 authors. Xiao Dongguang. Published 2015. Agricultural and Food Sciences, Chemistry. Journal of Food Safety and Quality. No Paper Link Available. Save to
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Determination of Carbamates in Beverages by
2012.6.1 Determination of Carbamates in Beverages by Liquid-Liquid Extraction with Low Temperature Partitioning and Liquid Chromatography. June 2012. Journal of the Brazilian Chemical Society 23 (6):1165....
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Graphene based solid phase extraction combined with ultra
2014.8.15 PMID: 24973804. DOI: 10.1016/jroma.2014.05.085. Abstract. In this paper, graphene, a new sorbent material, was synthesized and used for solid-phase extraction (SPE) of the six carbamate pesticides (pirimicarb, baygon, carbaryl, isoprocarb, baycarb and diethofencarb) in environmental water samples.
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Determination of four carbamate pesticides in corn by cloud
2009.10.14 A highly sensitive method for the determination of arprocarb (AC), carbofuran (CF), isoprocarb (IC), and fenobucarb (FC) is proposed, based on alkaline hydrolysis of the four carbamate pesticides, and the resultant hydrolytic products are reacted with 4-aminoantipyrene to give four red color products. A highly sensitive method for the
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Solid phase extraction of carbamate pesticides with banana
In this work, biomass derived hierarchical porous carbon (BHPC) was prepared via a facile, cost-effective and green route by carbonizing banana peel waste. Textural characterization shows that the material possesses hierarchical pores and a large Brunauer–Emmett–Teller surface area of 561.8 m 2 g −1.The BHPC was used as a solid phase extraction sorbent
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Permeabilization of Chlorella sorokiniana and extraction of
2021.2.1 The extraction of lutein was optimized using one-factor-at-a-time (OFAT) approach covering operating parameters such as types of CO 2-based alkyl carbamate ILs, concentration of ILs, extraction period, and temperature. The morphologies of the permeabilized microalgal cells were characterized by light microscopy and field emission
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Permeabilization of Haematococcus pluvialis and solid-liquid extraction ...
2021.5.1 2.3.Characterization of CO 2-based alkyl carbamate ILs. The synthesized CO 2-based alkyl carbamate ILs were characterized in terms of structural properties, purity, and functional groups by a FTIR spectroscopy (Frontier, Perkin Elmer) using an average of 32 scans over 4000 – 400 cm −1.The FTIR spectra are shown in SI-1 – SI-5. The
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Permeabilization of Haematococcus pluvialis and solid-liquid extraction ...
2021.5.1 Effects of the type of CO 2-based alkyl carbamate ILs on astaxanthin extraction. Four different types of CO 2-based carbamate ILs were evaluated for their performances in dissolving the astaxanthin from the H. pluvialis that had not undergone the intensive mechanical cell disruption. The chemical structural and functional group of the ...
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Intoxications aiguës aux pesticides anti-cholinestérasiques de type ...
2014.12.8 extraction liquide liquide par le dichlorométhane à pH = 3. La recherche du carbamate pesticide a été réalisée par chro- matographie sur couche mince, une technique de recherche
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Extraction liquide-liquide : théorie, applications, difficultés
2010.1.1 Notre méthode d'extraction, est une extraction liquide-liquide, le choix de ce type d'extraction est fonction de plusieurs intérêts à savoir [8]. Pour qu'une molécule soit analysable par HPLC ...
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Permeabilization of Haematococcus pluvialis and solid-liquid extraction ...
To address these shortcomings, we demonstrated a sustainable extraction system that utilizes CO 2-based alkyl carbamate ILs to permeate H. pluvialis cells and extract astaxanthin. This class of ILs is readily distillable for an easy recovery of ILs from the extraction medium.
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Permeabilization of Chlorella sorokiniana and extraction of
@article{Khoo2020PermeabilizationOC, title={Permeabilization of Chlorella sorokiniana and extraction of lutein by distillable CO2-based alkyl carbamate ionic liquids}, author={Kuan Shiong Khoo and Yen Mun Chong and W. S. Chang and Jie Min Yap and Su Chern Foo and Ianatul Khoiroh and Phei-Li Lau and Kit Wayne Chew and Chien Wei Ooi and Pau Loke ...
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Efficient Extraction and Determination of Carbamate Pesticides
2022.2.8 The applicability of TpDB as adsorbent was investigated for determination of trace carbamate pesticides residue in vegetables with satisfactory recoveries of four carbamates in the range of 80.4–101.2%. The results demonstrated that the COF-TpDB offer great potential for efficient extraction of carbamate pesticides from complicate
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Microextraction liquide sur une goutte — Wikipédia
2024.4.20 L’ extraction liquide-liquide (ou LLE) est la méthode la plus conventionnelle et la plus utilisée pour séparer un analyte de sa matrice. Récemment, des recherches ont été développées pour miniaturiser la LLE. La Single drop microextraction (« microextraction sur une goutte »), plus communément appelée SDME, a été introduite pour ...
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extraction liquide carbamate - chateautourduroc
Determination of Ethyl Carbamate in Wine by SolidPhase . Propyl carbamate was chosen as the internal standard because its extraction and chromatographic behavior should be very simi lar to ethyl carbamate and it is used in existing methods. The internal standard spiking solution was prepared at mg/ L in 15 (v/v) ethanol in distilled water.
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Cloud-point extraction and reversed-phase high
2009.2.26 A cloud-point extraction (CPE) method using Triton X-114 non-ionic surfactant was developed for the extraction and preconcentration of carbamate insecticide residues (i.e., methomyl, propoxur, carbofuran, carbaryl, isoprocarb, and promecarb) in fruit samples. The optimum conditions of CPE were 1.5% (w/v) Triton X-114, 7.0% (w/v) NaCl
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Permeabilization of Haematococcus pluvialis and solid-liquid extraction ...
2021.1.17 @article{Khoo2021PermeabilizationOH, title={Permeabilization of Haematococcus pluvialis and solid-liquid extraction of astaxanthin by CO2-based alkyl carbamate ionic liquids}, author={Kuan Shiong Khoo and Chien Wei Ooi and Kit Wayne Chew and Su Chern Foo and Jun-Wei Lim and Yang Tao and Ning Jiang and Shih‐Hsin
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Permeabilization of Haematococcus pluvialis and solid-liquid ...
2021.1.18 Permeabilization of Haematococcus pluvialis and solid-liquid extraction of astaxanthin by CO2-based alkyl carbamate ionic Chemical Engineering Journal ( IF 13.273) Pub Date : 2021-01-17 10. Kuan Shiong Khoo, Chien Wei Ooi, Kit Wayne Chew, Su Chern Foo, Jun Wei Lim, Yang Tao, Ning Jiang, Shih-Hsin Ho, Pau Loke Show
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Determination of carbamate pesticides using micro-solid
2009.1.9 After extraction, the μ-SPE devices were desorbed in methanol. The results are shown in Fig. 1. Compared to the other materials, the relatively less polar C 18 shows higher extraction efficiency towards carbamate pesticides. The μ-SPE mechanism is similar to the conventional SPE procedure.
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CO2-Based Alkyl Carbamate Ionic Liquids as Distillable Extraction ...
2014.5.23 CO 2 -based alkyl carbamate ILs have demonstrated their ability to optimize extraction of bioproducts such as astaxanthin [10], lutein [11] and curcumin [12] from microalgae species. In this study ...
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Optimization of microwave-assisted extraction and supercritical
2003.10.3 Considering the above, it is of interest to use SFE to extract carbamate pesticides from solid matrices and develop a strategy to optimize the process. MAE has been successfully applied to the simultaneous extraction of toxic organic contaminants from different solid matrices, such as polycyclic aromatic hydrocarbons ...
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Determination of four carbamate pesticides in corn by cloud
2009.10.14 A highly sensitive method for the determination of arprocarb (AC), carbofuran (CF), isoprocarb (IC), and fenobucarb (FC) is proposed. The method is based on alkaline hydrolysis of the four carbamate pesticides, and the resultant hydrolysis products are reacted with 4-aminoantipyrene (AP) to give fou
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Extraction liquide/liquide: cours et TD - hal.science
2024.5.1 Comme l'illustre la figure ci-dessous, l'extraction liquide/liquide proprement dite comporte donc deux étapes : la mise en contact de la solution et du solvant, au cours de laquelle le soluté est transféré du liquide à raﬀiner vers le liquide d'extraction, et la séparation mécanique des deux phases.
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Elevated Temperature Homogeneous Liquid Phase Extraction
2020.3.28 In the present study, an elevated temperature homogeneous liquid extraction coupled with ionic liquid‑based dispersive liquid–liquid microextraction was developed to extract five carbamate pesticides (pirimicarb, carbaryl, methiocarb, aldicarb, and carbofuran) from packed fruit juice samples. The method consisted of a two-step
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Extraction liquide-liquide en milieu supercritique et
Afin de réduire l'impact sur l'environnement et rendre le procédé de recyclage plus vert, un solvant de remplacement potentiel est le CO₂ supercritique (ScCO₂). Dans cette thèse, nous proposons une méthode spéciale appelée extraction au CO₂ supercritique pour récupérer efficacement ces terres rares des déchets électroniques.
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Extraction and Identification Techniques for
2021.12.21 The usage of carbamate pesticides in agriculture is increasing year by year. Carbamate pesticides are thioesters and esters, which are derived from aminocarboxylic acid. Carbamates are commonly
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Permeabilization of Haematococcus pluvialis and solid-liquid extraction ...
2021.1.17 To address these shortcomings, we demonstrated a sustainable extraction system that utilizes CO2-based alkyl carbamate ILs to permeate H. pluvialis cells and extract astaxanthin.
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Determination of Carbamate and Organophosphorus
2006.7.1 A liquid chromatography-mass spectrometry (LC-MS) method was established for the simultaneous determination of carbamate and organophosphorus (OPPs) pesticides in fruits and vegetables by dispersive solid phase extraction using acetonitrile as the extractant and primary secondary amine (PSA) as the sorbent instead of octadecyl
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Extraction liquide-liquide : théorie, applications, difficultés
Extraction liquide-liquide : théorie, applications, difﬁcultés Liquid-liquid extraction: theory, applications and difﬁculties Emuri Abe, Stanilas Grassin Delyle, Jean Claude Alvarez Laboratoire de Pharmacologie-Toxicologie, Centre Hospitalier Universitaire Raymond Poincaré, AP-HP et UVSQ, 104 boulevard
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Room temperature imidazolium ionic liquid: A solvent for extraction
2011.6.15 1. Introduction. Carbamate insecticides are a large class of pesticides widely used in agriculture. Some carbamates are extreamly toxic to the central nervous system and are suspected carcinogens and mutagens [1].Carbaryl, carbofuran and methiocarb are three of the most important N-methylcarbamate insecticides which
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Les méthodes d'extraction — Chimie Analytique
Phase mobile/phase stationnaire. L’extraction Liquide – Solide est constituée de quatre étapes. 1ère étape : le conditionnement de la phase solide est obligatoire, dans le but de la rincer, l’activer, et enfin de la saturer le même solvant que celui qui contient l’échantillon. 2ème étape : la rétention. Le passage de la ...
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Development of a new solid phase extraction method for
2020.11.1 Determination of carbamate pesticides and phthalates in vegetables by a cloud point extraction process using tergitol 15-S-7 and high performance liquid chromatography Anal. Lett. , 45 ( 2012 ) , pp. 2663 - 2674
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Permeabilization of Haematococcus pluvialis and solid-liquid ...
2021.1.18 Permeabilization of Haematococcus pluvialis and solid-liquid extraction of astaxanthin by CO2-based alkyl carbamate ionic liquids Chemical Engineering Journal ( IF 15.1) Pub Date : 2021-01-17, DOI: 10.1016/j.cej.2021.128510
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