• N,N′-diallylimidazolium-based ionic liquids have also been used as extractant to highly enrich organic pollutants from aqueous samples in microextraction techniques, such as dispersed liquid-liquid microextraction and single drop microextraction, or to functionalize the stationary phase of chromatographic column and solid fiber membranes [ 15 - 21 ]. (hindawi.com)
  • ILs and PILs have been previously applied in various extraction methods including single-drop microextraction (SDME), liquid-phase microextraction (LPME), solid-phase microextraction (SPME), dispersive liquid-liquid microextraction (DLLME), hollow fiber-supported liquid membrane extraction (HFSLME), and solid-phase extraction (SPE) (2-7). (chromatographyonline.com)
  • Das, P., Gupta, M., Jain, A. and Verma, K. Single drop microextraction solid phase micro extraction gas chromatography- mass spectrometry for the determination of iodine by pharmaceuticals, iodized salt milk powder and vegetables involving conversion into 4-iodo-N, N-dimethylanilime. (i-scholar.in)
  • This method was based on headspace solid phase microextraction coupled to gas chromatography-tandem mass spectrometry (HS-SPME-GC-MS/MS) (Silva et. (cdc.gov)
  • Active compounds are identified on the basis of their Rf values, while nonidentifiable active volatile compounds can be cut out from the silica gel and analyzed using the headspace solid-phase microextraction method coupled to gas chromatography-mass spectrometry (HS-SPME/GC-MS) [ 14 ] . (encyclopedia.pub)
  • Using this approach, 45 toxic VOCs ranging in water solubility and boiling point were evaluated and analyzed by headspace solid-phase microextraction/gas chromatography-mass spectrometry. (cdc.gov)
  • Results show that urine VOCs could be equally lost to the container headspace as to the container surface suggesting similarity of these two regions as partition phases. (cdc.gov)
  • Solid Phase Micro Extraction (SPME) is a widely used technique for extraction and concentration of VOCs and SVOCs combined with GC/MS. Unique to absorption techniques for GC, SPME is suited for both small and larger molecules, and the absorption may take place in either the headspace or liquid. (msconsult.dk)
  • In this study, a three-phase hollow fiber liquid-phase microextraction (HF-LPME) method combined with liquid chromatography-mass spectrometry was developed for direct determination of four non-steroidal anti-inflammatory drugs (ketoprofen, naproxen, diclofenac and ibuprofen) in sewage sludge. (lu.se)
  • article{d00661c0-6ec4-4bdd-b5a4-c6ce54706b4d, abstract = {{In this study, a three-phase hollow fiber liquid-phase microextraction (HF-LPME) method combined with liquid chromatography-mass spectrometry was developed for direct determination of four non-steroidal anti-inflammatory drugs (ketoprofen, naproxen, diclofenac and ibuprofen) in sewage sludge. (lu.se)
  • Hollow-fibre liquid-phase microextraction (HF-LPME) was introduced in 1999 as a miniaturised version of liquid-liquid extraction (LLE) in order to reduce the consumption of organic solvents and offer an environmentally-friendly approach to extraction procedures. (gla.ac.uk)
  • The principle of HF-LPME is the extraction of analytes across a thin supported liquid membrane within the walls of a hollow fibre from a donor phase (DP) into an acceptor phase (AP). (gla.ac.uk)
  • For this, a fast, accurate and precise 3-phase HF-LPME method followed by LC-MS/MS analysis was developed and validated to simultaneously quantify 5 NBOMe drugs in human whole blood. (gla.ac.uk)
  • These drugs were divided into two groups (acidic and basic/neutral), and a total of four extraction methods (two for each group of analytes) were developed and optimised using chemometrics (DoE) then analysed by LC-MS/MS. Two of these methods were liquid-liquid extraction (LLE) methods that were developed and validated to be used as reference to which the two HF-LPME methods were compared. (gla.ac.uk)
  • EME is closely related to liquid-phase microextraction (LPME) and provides high pre-concentration and efficient sample clean-up. (wikipedia.org)
  • In this work, the use of a hydrophobic natural deep eutectic solvent (NADES) as supported liquid membrane (SLM) for hollow fiber liquid-phase microextraction (HF-LPME) of sulfonamides is proposed. (fecyt.es)
  • In this work, we reported the development of a novel, simple, and green liquid-phase microextraction (LPME) procedure based on the use of a customized device for the determination of 47 multiclass pesticides in red, white, and rosè wine samples by GC-MS. The main parameters that affect the LPME were optimized using multivariate statistical techniques such as centroid-simplex mixture design and Doehlert design. (bvsalud.org)
  • It possess acute toxicity and health hazard such as strong irritation effect on eyes, skin, mucous membranes and respiratory tract, may cause death after inhalation, oral administration or skin absorption. (pressnews.biz)
  • However, it has been noted that the coating of ionic liquid is noncovalent, which means that ionic liquid is more easily desorbed from surface and preconcentration of organic pollutants is strongly affected by the extraction parameters. (hindawi.com)
  • Functionality of MNPs with ionic liquids greatly influenced the solubility of the MNPs with organic solvents depending on the alkyl chain length and the anions of the ionic liquids. (hindawi.com)
  • Ionic liquids, which can be tuned by choosing of the cations and anions independently, exhibited unique physicochemical properties, such as tunable miscibility with water and organic solvents, and have potential applications as electrolyte materials, green solvents, catalysts, and separation mediums [ 9 - 14 ]. (hindawi.com)
  • Ionic liquids have tunable selectivity for specific classes of analytes, giving them distinct advantages over organic solvents. (chromatographyonline.com)
  • For this purpose, nine natural hydrophobic deep eutectic solvents based on the terpenoids camphor, thymol and menthol at different molar ratios were investigated for the first time as extractants for the liquid-liquid microextraction of the target analytes from coconut waters and Aloe Vera drinks. (bvsalud.org)
  • Sustainable green solvents for microextraction techniques: Recent developments and applications. (nih.gov)
  • Different methods are available for the separation of small molecules including High Performance liquid chromatography (HPLC) , liquid chromatography (LC) , gas chromatography (GC) , thin-layer chromatography (TLC) and capillary electrophoresis (CE). (sigmaaldrich.com)
  • Supel™ Carbon LC U/HPLC columns packed with porous graphitic carbon (PGC) particles, used for the HPLC, UHPLC, UPLC, and LC-MS separation of polar or charged compounds at high temperatures (up to 250 ˚), pressures up to 700 bar, and the mobile phase pH range of 1-14. (sigmaaldrich.com)
  • The HPLC analysis of small molecules most often is performed in reversed-phase separation mode. (sigmaaldrich.com)
  • For separation of polar compounds hydrophilic interaction chromatography (HILIC) and normal-phase chromatography are suitable as well, with HILIC being the preferred method. (sigmaaldrich.com)
  • The typical pore size of the stationary phase material for small molecule separation is in the range of 60 Å - 160 Å. (sigmaaldrich.com)
  • D1.2 11:20 Liquid-liquid phase separation induced by carbon dioxide absorption in amine - water systems. (confis.cz)
  • Therefore, a simple, rapid procedure for simultaneous determination of fifteen phthalate metabolites in human urine samples by liquid chromatography-tandem mass spectrometry was developed. (bvsalud.org)
  • Target compounds are extracted from an aqueous sample, through a µL-volume of organic solvent sustained as a thin supported liquid membrane (SLM) in the pores in the wall of a porous hollow fiber, and into an acceptor solution inside the lumen of the hollow fiber. (wikipedia.org)
  • The organic analytes partition between the water sample and the stationary phase coating of a fused silica fiber before they are thermally desorbed in a GC injector. (cdc.gov)
  • Low-bleed silica-based stationary phase for hydrophilic interaction liquid chromatography, Anal. (ecust.edu.cn)
  • Preparation of a low bleeding polar stationary phase for hydrophilic interaction liquid chromatography, Talanta, 2018, 182, 500-504. (ecust.edu.cn)
  • Poly(vinyl alcohol)-cationic cellulose copolymer encapsulated SiO2 stationary phase for hydrophilic interaction liquid chromatography, RSC Adv. 2017, 7, 21336-21341. (ecust.edu.cn)
  • A positively charged porous graphitic carbon stationary phase for hydrophilic interaction liquid chromatography, Talanta, 2017, 164, 159-163. (ecust.edu.cn)
  • Poly(vinyl alcohol) Modified Porous Graphitic Carbon Stationary Phase for Hydrophilic Interaction Liquid Chromatography, Anal. (ecust.edu.cn)
  • 10. Yahui Peng, Yanjie Hou, Feifang Zhang, Guobin Shen, B. C. Yang* , A hyperbranched polyethylenimine functionalized stationary phase for hydrophilic interaction liquid chromatography, Anal Bioanal Chem. (ecust.edu.cn)
  • An arginine-functionalized stationary phase for hydrophilic interaction liquid chromatography. (ecust.edu.cn)
  • Getting the best possible results in the high-performance liquid chromatography (HPLC), UHPLC or LC-MS analysis of small molecules depends on the selection of the best suitable stationary phase and mobile phase conditions. (sigmaaldrich.com)
  • Other aspects such as speed, sample matrix, and number of compounds define the best suitable base material for the stationary phase. (sigmaaldrich.com)
  • The HPLC column is packed with either fully porous silica particles, superficially porous silica particles, polymeric particles or consists of a monolithic silica rod as the stationary phase. (sigmaaldrich.com)
  • For HPLC the typical particle size of the stationary phase ranges from 3 µm to 5 µm, for UHPLC smaller particles sizes, typically 2 µm or below, are used. (sigmaaldrich.com)
  • The obtained six kinds of ionic liquid modified MNPs were characterized with transmission electron microscopy, thermogravimetric analysis, magnetization, and FTIR, which owned the high adsorption capacity due to the nanometer size and high-density modification with ionic liquids. (hindawi.com)
  • MNPs coated with ionic liquid were applied to preconcentrate polycyclic aromatic hydrocarbons (PAHs) in water samples through forming mixed hemimicelles on the surface of MNPs. (hindawi.com)
  • To the best of our knowledge, this is the first work about application of the chemically bonded ionic liquid modified MNPs for detecting carcinogenic organic pollutants in environmental water samples. (hindawi.com)
  • Determination of the fatty acid composition of nuts using established methods for GC analysis on capillary columns of 3 selectivities: Omegawax, SP-2560, and ionic liquid based SLB-IL111. (sigmaaldrich.com)
  • The drugs were extracted from non-spiked and spiked slurry samples with different amounts of sludge into an organic phase and then back-extracted into an aqueous phase held in the lumen of the hollow fiber. (lu.se)
  • EME involves the use of a small supported liquid membrane (SLM) sustained in the wall of a porous hollow fiber, and application of an electrical field across the SLM. (wikipedia.org)
  • In this work, we propose the use of electro-membrane extraction (EME) to improve analytical methods based on hollow fiber liquid phase micro-extraction (HFLPME). (bvsalud.org)
  • This short review covers the use of ionic liquids (ILs) and polymeric ionic liquids (PILs) in solid-phase microextraction (SPME) and dispersive liquid-liquid microextraction (DLLME). (chromatographyonline.com)
  • Over the past decade, ionic liquids (ILs) and polymeric ionic liquids (PILs) have been widely studied and applied in multiple areas of science and engineering. (chromatographyonline.com)
  • The electrostatic interactions between the sulfonic-acid-functionalized polymeric membrane and the amine group in the pregabalin molecule facilitate higher preconcentration factor at a shorter extraction time. (hindawi.com)
  • New polymeric sorbent for the solid-phase extraction of indole-3-acetic acid from plants followed by liquid chromatography - Fluorescence detector. (mipdatabase.com)
  • We developed, optimized and validated a fast analytical cycle using high throughput bar adsorptive microextraction and microliquid desorption (HT-BAμE-μLD) for the extraction and desorption of ketamine and norketamine in up to 100 urine samples simultaneously, resulting in an assay time of only 0.45 min/sample. (mdpi.com)
  • Electro membrane extraction, or EME, is a miniaturized liquid-liquid extraction technique developed for sample preparation of aqueous samples prior to analysis by chromatography, electrophoresis, mass spectrometry, and related techniques in analytical chemistry. (wikipedia.org)
  • Membrane-based microextraction techniques in analytical chemistry: A review. (nih.gov)
  • Determination of the target analytes was carried out by ultra-high performance liquid chromatography coupled to tandem mass spectrometry. (bvsalud.org)
  • Propyl chloroformate is used as a derivatization reagent in quantification of serotonin, dopamine, and norepinephrine in human urine by solid phase micro extraction-gas chromatography-triple quadruple mass spectrometry. (pressnews.biz)
  • Furthermore, the options for their identification include nuclear magnetic resonance spectroscopy (NMR) or mass spectrometry (MS) . Liquid chromatography coupled with mass spectrometry (LC-MS) became a key technique for the identification of small molecules during recent years. (sigmaaldrich.com)
  • Metabolites were quantified using reversed-phase ultra-high performance liquid chromatography and electrospray ionization tandem mass spectrometry. (cdc.gov)
  • Liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) with stable isotope labeled internal standards (SIL-IS) is the gold standard for quantitative analysis of drugs and metabolites in complex biological samples. (cdc.gov)
  • A sulfonated poly(ether ether ketone) membrane was used as a sorbent for pregabalin extraction, and the extraction performance was compared with that of the conventional polydimethylsiloxane membrane. (hindawi.com)
  • 1992) used solid phase micro extraction to separate volatile halogenated compounds from water samples. (cdc.gov)
  • In this work, the reagent Cyanex® 272 has been incorporated in a three-phase solvent bar micro-extraction system to selectively separate the inorganic and organic fractions of copper in seawater. (bvsalud.org)
  • New sorbents for extraction and microextraction techniques. (nih.gov)
  • Simultaneous determination of four plant hormones in bananas by molecularly imprinted solid-phase extraction coupled with high performance liquid chromatography. (mipdatabase.com)
  • Miniaturized molecularly imprinted matrix solid-phase dispersion coupled with high performance liquid chromatography for rapid determination of auxins in orange samples. (mipdatabase.com)
  • Multipoint recognition of domoic acid from seawater by dummy template molecularly imprinted solid-phase extraction coupled with high-performance liquid chromatography. (mipdatabase.com)
  • The acceptor solution is an aqueous solution, and can be analyzed by liquid chromatography (LC) or capillary electrophoresis (CE). (wikipedia.org)
  • The novelty of the present procedure is based on the use of diethyl carbonate as a green biobased extraction solvent and air-assisted liquid-liquid microextraction (AALLME) as a sample preparation step. (bvsalud.org)
  • Two methods of fluroxypyr extraction were used, namely, Direct Measurement of fluroxypyr and Concentration of fluroxypyr onto A Solid Phase Extraction (SPE) Adsorbent, followed by elution with solvent before determination of fluroxypyr. (afpm.org.my)
  • Pereira, F.P., Ferreiros S., Lavilla, I. and Bendicho, Determination of iodates in waters by cuvetteless U.V-Vis microspectrophotometry after liquid phase microextraction. (i-scholar.in)
  • Gupta, M., Pillai, A.K., Singh, A., Jain A. and Verma, K.K. Salt assisted liquid-liquid microextraction for the determination of iodine in table salt by high performance liquid chromatoghraphy-diode array detection. (i-scholar.in)
  • Heat-shrink tubing as a solid-phase microextraction coating for the enrichment and determination of phthalic acid esters, J. Sep. (ecust.edu.cn)
  • D1.3 11:40 Encapsulated ionic liquids for enhancing the kinetics of the CO2 physical absorption by ionic liquids. (confis.cz)
  • It solves the problem of the limitation of absorption rate and absorption capacity existing in the traditional solid-phase microextraction process. (innoteg-instruments.com)
  • Stig Pedersen-Bjergaard and Knut Einar Rasmussen Electrokinetic Migration across Artificial Liquid Membranes - New concept for Rapid Sample Preparation of Biological Fluids Journal of Chromatography A 1109 (2006) 183-190. (wikipedia.org)
  • These compounds have high vapor pressures with low water solubility and are emitted as gases from solids or liquids. (cdc.gov)
  • 4. Extraction from Liquid Samples a. (eas.org)
  • The most convenient procedure for most liquid and solid samples is the purge-and-trap method. (cdc.gov)
  • Samples were collected in natura or during different steps of the industrial process of extraction (steam distillation and solid/liquid extraction). (plos.org)
  • D3.2 11:20 COSMO-RS screening of ionic liquids for improving the microextraction of octachloro-dibenzo-p-dioxin from aqueous samples. (confis.cz)
  • Literature review revealed that conventional direct analysis or liquid-liquid extraction methods were used to analyze pregabalin in tablets or biological matrices. (hindawi.com)
  • The approach for liquid phase synthesis in C1 chemistry. (confis.cz)
  • Under optimum conditions, Ni was pre-concentrated 180 ± 17 times after 15 min, using sample pH = 5.5, the concentration of DEHPA 0.9 M in the liquid membranes, and 1.9 M HNO3 in the acceptor solution, as well as an electric potential of 25 V with the sample being stirred at 500 rpm. (bvsalud.org)
  • In a model controlling for other factors, the use of extracorporeal membrane oxygenation was associated with significantly (p 0.05) higher metabolite levels of acrolein, acrylonitrile, ethylene oxide, propylene oxide, styrene, and ethylbenzene. (cdc.gov)
  • D2.4 15:00 Simultaneous removal of NOx and SO2 by gas phase oxidation with ozone and wet scrubbing with NaOH solution. (confis.cz)
  • An integrated device of electrodialytic membrane suppressor and charge detector for ion chromatography, Anal. (ecust.edu.cn)
  • Sclareol is a high-value natural product obtained by solid/liquid extraction of clary sage ( Salvia sclarea L.) inflorescences. (plos.org)
  • LAMBDA VIT-FIT and VIT-FIT high pressure lab syringe pumps are suitable for high-pressure, high-speed & counter pressure applications and handling of liquids with higher viscosity in the laboratory. (lambda-instruments.com)
  • Solid-phase extraction f. (eas.org)
  • Solid-phase microextraction h. (eas.org)
  • Water-compatible dummy molecularly imprinted resin prepared in aqueous solution for green miniaturized solid-phase extraction of plant growth regulators. (mipdatabase.com)
  • Preparation of Indole-3-acetic Acid-imprinted Polymer Particulates by Precipitation Polymerization and Their Application in Solid Phase Extraction. (mipdatabase.com)
  • New immobilisation protocol for the template used in solid-phase synthesis of MIP nanoparticles. (mipdatabase.com)
  • Astrid Gjelstad, Stig Pedersen-Bjergaard Electromembrane extraction - Three phase electrophoresis for future preparative applications Electrophoresis 35 (2014) 2421-2428. (wikipedia.org)
  • Oily liquid with a range of colors from colorless to violet-black, green, amber, or dark brown. (cdc.gov)