Results 171 to 180 of about 5,024,272 (209)

Solid drop based liquid-phase microextraction

Journal of Chromatography A, 2010
Solid drop based liquid-phase microextraction (SDLPME) is a novel sample preparation technique possessing obvious advantages of simple operation with a high pre-concentration factor, low cost and low consumption of organic solvent. SDLPME coupled with gas chromatography (GC), high-performance liquid chromatography (HPLC), and atomic absorption ...
Mohammad Reza, Ganjali, Hamid Reza, Sobhi, Hadi, Farahani, Parviz, Norouzi, Rassoul, Dinarvand, Amir, Kashtiaray   +5 more
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Headspace Water-Based Liquid-Phase Microextraction

Analytical Chemistry, 2005
A new organic-free mode of headspace liquid-phase microextraction termed headspace water-based liquid-phase microextraction has been developed. Five phenols were used as model compounds in the development and evaluation of the procedure. Parameters affecting the extraction efficiency were investigated.
Zhang, J., Su, T., Hian, K.L.
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Liquid phase microextraction applications in food analysis

Journal of Chromatography A, 2011
Over the last years, liquid-phase microextraction (LPME) in its different application modes (single drop microextraction, dispersive liquid-liquid microextraction and hollow fiber-LPME) has been increasingly applied for the extraction of both inorganic and organic analytes from different matrices. Its advantages over conventional extraction procedures (
María, Asensio-Ramos, Lidia M, Ravelo-Pérez, Miguel Ángel, González-Curbelo, Javier, Hernández-Borges   +3 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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Liquid-Phase Microextraction in Bioanalytical Sample Preparation

Bioanalysis, 2009
Liquid-phase microextraction (LPME) emerged in the mid-to-late 1990s, facing up to the main shortcomings of the classical liquid-liquid extraction. Since its origin, this new technique has been in continuous development driven by its successful and widespread use in the analytical sciences. Its inherent properties, such as low sample volume requirement,
Rafael, Lucena, Marta, Cruz-Vera, Soledad, Cárdenas, Miguel, Valcárcel   +3 more
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Successive liquid-phase microextraction of acidic and basic analytes

Analytica Chimica Acta, 2022
Practical biological and environmental samples always contain both acidic and basic substances, and the samples are always precious. Thus, separation of analytes with different nature from the same sample was of great significance. Successive liquid phase microextraction (sLPME) of acidic and basic analytes under optimal extraction conditions was ...
Ruiqin, Zhu, Hang, Mei, Huajing, Liu, Changbao, Hong, Xiantao, Shen, Chuixiu, Huang   +5 more
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The Role of Liquid-Phase Microextraction Techniques in Bioanalysis

Bioanalysis, 2015
Sample preparation is one of the most challenging tasks in laboratories, particularly in what concerns biological specimens, since they cannot be directly analyzed. A considerable amount of time and effort is spent in the extraction of the analytes and their concentration in a solvent that is compatible with analytical instrumentation.
Mário, Barroso, Eugenia, Gallardo, João A, Queiroz   +2 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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Recent advances in liquid-phase microextraction techniques for the analysis of environmental pollutants

TrAC - Trends in Analytical Chemistry, 2017
The liquid-phase microextraction (LPME) method is a sample pretreatment technique that uses small volumes of organic solvents to extract a wide variety of analytes from different matrices prior to instrumental analysis.
Mojtaba Shamsipur, Jongki Hong, Akash Deep   +2 more
exaly   +1 more source

Dynamic headspace liquid-phase microextraction of alcohols

Journal of Chromatography A, 2005
A method was developed using dynamic headspace liquid-phase microextraction and gas chromatography-mass spectrometry for extraction and determination of 9 alcohols from water samples. Four different solvents, hexyl acetate, n-octanol, o-xylene and n-decane were studied as extractants.
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