Results 191 to 200 of about 30,021 (227)

Liquid-Phase Microextraction

2017
Liquid-phase microextraction (LPME) has emerged over the last 15–20 years as one of the simplest and most easily implemented techniques of sample preparation in the determination of organic analytes in a variety of matrices. This article summarizes the historical developments and various modes of the technique, method development, recent trends, and ...
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Application of ionic liquid in liquid phase microextraction technology

Journal of Separation Science, 2012
Ionic liquids (ILs) are novel nonmolecular solvents. Their unique properties, such as high thermal stability, tunable viscosity, negligible vapor pressure, nonflammability, and good solubility for inorganic and organic compounds, make them excellent candidates as extraction media for a range of microextraction techniques.
Dandan, Han, Baokun, Tang, Yu Ri, Lee, Kyung Ho, Row   +3 more
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Liquid-phase microextraction preconcentration of impurities

Journal of Analytical Chemistry, 2011
The miniaturization of the preconcentration methods is one of the fields of contemporary analytical chemistry. A new method of liquid-liquid microextraction preconcentration has been developed for the last 10–15 years; it is highly efficient, rapid, simple in implementation, and ecologically safe. The methodology and principles of the implementation of
V. A. Krylov, A. V. Krylov, P. V. Mosyagin, Yu. O. Matkivskaya   +3 more
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Pharmaceutical applications of liquid-phase microextraction

TrAC Trends in Analytical Chemistry, 2018
Abstract Despite the significant advances in analytical equipment, measuring drugs in biological fluids, metabolic studies and determining their therapeutic range and side effects requires a sample preparation step, which is due to the low concentration of the drug and/or the complexity of the sample matrix.
Shahram Seidi, Maryam Rezazadeh, Yadollah Yamini   +2 more
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Liquid-Phase Microextraction or Electromembrane Extraction?

Analytical Chemistry, 2019
Isolation of substances by liquid-phase microextraction (LPME) or electromembrane extraction (EME) is becoming more and more important in analytical chemistry. However, the understanding of the mass transfer in LPME and EME is limited, especially for highly concentrated samples.
Libin Wan, Bin Lin, Ruiqin Zhu, Chuixiu Huang, Stig Pedersen-Bjergaard, Xiantao Shen   +5 more
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Dynamic headspace time-extended helix liquid-phase microextraction

Journal of Chromatography A, 2009
Liquid-phase microextraction (LPME) has been proved to be a fast, inexpensive and effective sample pre-treatment technique for the analyses of pesticides and many other compounds. In this investigation, a new headspace microextraction technique, dynamic headspace time-extended helix liquid-phase microextraction (DHS-TEH-LPME), is presented.
Shih-Pin, Huang, Pai-Shan, Chen, Shang-Da, Huang   +2 more
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Reduction of extraction times in liquid-phase microextraction

Journal of Chromatography B: Biomedical Sciences and Applications, 2001
Recently, we introduced a simple and inexpensive disposable device for liquid-phase microextraction (LPME) based on porous polypropylene hollow fibres. In the present paper, extraction times were significantly reduced by an increase in the surface of the hollow fibres.
Grønhaug Halvorsen, Trine, Pedersen-Bjergaard, Stig, Rasmussen, Knut E.   +2 more
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Dynamic hollow fiber-supported headspace liquid-phase microextraction

Journal of Chromatography A, 2005
With the increasing concern over deteriorating environmental quality, the analysis of organic pollutants in air, water, and soil has become critically important. The development of simple, efficient, and inexpensive analytical sample pretreatment is crucial for monitoring and evaluating the environment.
Xianmin, Jiang, Chanbasha, Basheer, Jie, Zhang, Hian Kee, Lee   +3 more
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Ionic liquids in solid-phase microextraction: A review

Analytica Chimica Acta, 2011
Solid-phase microextraction (SPME) has undergone a surge in popularity within the field of analytical chemistry in the past two decades since its introduction. Owing to its nature of extraction, SPME has become widely known as a quick and cost-effective sample preparation technique.
Tien D, Ho, Anthony J, Canestraro, Jared L, Anderson   +2 more
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Kinetic Calibration for Automated Headspace Liquid-Phase Microextraction

Analytical Chemistry, 2005
The kinetics of the absorption and desorption of analytes for headspace liquid-phase microextraction (HS-LPME) were studied. It was found that the desorption of analytes from the extraction phase into the sample matrix is isotropic to the absorption of the analytes from the sample matrix into the extraction phase under the same conditions.
Gangfeng, Ouyang, Wennan, Zhao, Janusz, Pawliszyn   +2 more
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