Results 131 to 140 of about 39,346 (163)

Lanthanum(III) and gadolinium(III) separation by cloud point extraction

Journal of Colloid and Interface Science, 2005
Abstract In the present study, cloud point extraction (CPE) is used with lipophilic chelating agents, 8-hydroxyquinoline (HQ) and Kelex 100 (K100), to extract and separate lanthanum(III) and gadolinium(III) from aqueous solutions. The methodology used is based on the formation of lanthanide(III) organic complexes that are soluble in a micellar phase ...
Niels, De Jong, Micheline, Draye, Alain, Favre-Réguillon, Gérard, Lebuzit, Gérard, Cote, Jacques, Foos   +5 more
openaire   +2 more sources

Determination of photoinitiator 4‐methylbenzophenone in milk by cloud point extraction

Journal of Separation Science, 2016
An efficient and easy sample pretreatment methodology was proposed for the detection of photoinitiator 4‐methylbenzophenone from milk before high‐performance liquid chromatography. Appropriate conditions for demulsification were studied. The parameters affecting cloud point extraction, such as concentration of Tween‐20, electrolyte salt, equilibration ...
Shengli, Ding, Yanqiu, Cao, Aijun, Gong, Yujiao, Wang   +3 more
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Separation and preconcentration of persistent organic pollutants by cloud point extraction

Journal of Chromatography A, 2010
Persistent organic pollutants (POPs) are recognized as a class of poisonous compounds which pose risks of causing adverse effects to human health and the environment. Thus, it is very important to detect POPs in environmental and biological samples.
Shunping, Xie, Man Chin, Paau, Cheuk Fai, Li, Dan, Xiao, Martin M F, Choi   +4 more
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Estimation of Distribution Parameters of Organic Solutes in Cloud Point Extraction

Journal of Colloid and Interface Science, 2000
Cloud point extraction of aromatic solutes in the system containing nonionic surfactant polyoxyethylene nonylphenyl ether (PONPE 10) was discussed in terms of their hydrogen-bond donating and accepting abilities and hydrophobicity. It was shown that the Abraham model could be used to estimate the distribution ratio and the effect of aromatic solutes on
, Szymanowski, , Apostoluk
openaire   +2 more sources

Alternating current cloud point extraction on a microchip: A comprehensive study

ELECTROPHORESIS, 2012
We present a comprehensive study of alternating current cloud point extraction (ACPE) on a microchip. ACPE is an extraction technique for preconcentration of membrane‐associated biomolecules. To characterize and optimize ACPE, we carried out ACPE experiments under various experimental conditions including amplitude and frequency of applied voltages ...
Naoki, Sasaki, Azusa, Takemura, Kae, Sato   +2 more
openaire   +2 more sources

On-Line Incorporation of Cloud Point Extraction to Flow Injection Analysis

Analytical Chemistry, 2001
The on-line incorporation of cloud point extraction (CPE) to flow injection analysis (FIA) is demonstrated for the first time. The technical difficulties of inducing the cloud point phenomenon, separating the surfactant-rich phase from the aqueous phase, and detecting trace amounts of analyte(s) in the presence of the highly scattering surfactant ...
Q, Fang, M, Du, C W, Huie
openaire   +2 more sources

Cloud Point Extraction as a Preconcentration Step Prior to Capillary Electrophoresis

Analytical Chemistry, 1999
Cloud point extraction was applied as a preconcentration step prior to capillary electrophoresis. The behavior of a surfactant-rich micellar phase injected into a capillary electrophoresis system was studied using different separation modes:  micellar electrokinetic capillary chromatography and capillary zone electrophoresis (CZE).
R, Carabias-Martínez, E, Rodríguez-Gonzalo, J, Domínguez-Alvarez, J, Hernández-Méndez   +3 more
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Micelles and Aggregates of Oxyethylated Isononylphenols and Their Extraction Properties near Cloud Point

The Journal of Physical Chemistry B, 2014
We used nuclear magnetic resonance (NMR) spectroscopy and dynamic light scattering (DLS) techniques to study the structural and dynamic properties of micellar solutions of nonionic surfactants of a homologous series of oxyethylated isononylphenols--C9H19C6H4O(C2H4O)(n)H, where n = 6, 8, 9, 10, or 12--in a wide range of temperatures, including cloud ...
Arkhipov V., Idiyatullin Z., Potapova E., Antzutkin O., Filippov A.   +4 more
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Ultrasonic Assisted Cloud Point Extraction of Polyaromatic Hydrocarbons

Separation Science and Technology, 2007
Abstract Cloud point extraction (CPE) of three PAHs, anthracene, phenanthrene, and pyrene was performed in an ultrasonic environment with Tergitol TMN‐6 as extractant. During the process, surfactant micelle aggregates came out gradually and deposited to form a surfactant‐rich phase.
Bingjia Yao, Li Yang
openaire   +1 more source

Decontamination of oil-polluted soil by cloud point extraction

Talanta, 1995
An extraction procedure based on cloud point phase separation of nonionic surfactants was used to remove oil contamination from soils. The detergent employed was Triton X-114, and its clouding behavior was monitored by means of a fluorescence probe. Changes in the I (1)I (3) ratio of pyrene indicated gradual dehydration of the detergent micelles upon ...
openaire   +1 more source