Results 141 to 150 of about 9,099 (177)
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Gas flow headspace liquid phase microextraction
Journal of Chromatography A, 2009There is a trend towards the use of enrichment techniques such as microextraction in the analysis of trace chemicals. Based on the theory of ideal gases, theory of gas chromatography and the original headspace liquid phase microextraction (HS-LPME) technique, a simple gas flow headspace liquid phase microextraction (GF-HS-LPME) technique has been ...
Cui, Yang +6 more
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Headspace Water-Based Liquid-Phase Microextraction
Analytical Chemistry, 2005A 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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Dynamic Liquid−Liquid−Liquid Microextraction with Automated Movement of the Acceptor Phase
Analytical Chemistry, 2005A new dynamic liquid-liquid-liquid microextraction procedure, with the automated movement of acceptor phase (LLLME/AMAP) to facilitate mass transfer, was developed in this study. Four compounds, 3-nitrophenol, 4-nitrophenol, 3,4-dinitrophenol, and 2,4-dichlorophenol, were used as model compounds to be preconcentrated from water samples.
Jiang, X., Sze, Y.O., Hian, K.L.
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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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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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Successive liquid-phase microextraction of acidic and basic analytes
Analytica Chimica Acta, 2022Practical 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 +5 more
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Liquid-phase microextraction preconcentration of impurities
Journal of Analytical Chemistry, 2011The 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 +3 more
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Dynamic headspace liquid-phase microextraction of alcohols
Journal of Chromatography A, 2005A 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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Pharmaceutical applications of liquid-phase microextraction
TrAC Trends in Analytical Chemistry, 2018Abstract 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 +2 more
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Nanoparticle-enhanced liquid-phase microextraction
TrAC Trends in Analytical Chemistry, 2015Abstract Nanostructured materials play roles in different areas of analytical chemistry. Implementation of nanomaterials in liquid-phase microextraction results in a synergic combination yielding enhanced performance. Some significant examples include: carbon nanotubes for improving extraction efficiency; magnetic nanoparticles for retrieving ionic ...
Carlos Bendicho +3 more
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Analytica Chimica Acta, 2005
Abstract Headspace solid phase microextraction (HS-SPME) and liquid–liquid–liquid microextraction with automated movement of the acceptor phase (LLLME/AMAP) techniques are described for the extraction of clenbuterol (CB) in urine. HS-SPME technique involves the extraction of the drug by SPME fibre in a headspace mode with a cooling device at the ...
Mahaveer B. Melwanki +2 more
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Abstract Headspace solid phase microextraction (HS-SPME) and liquid–liquid–liquid microextraction with automated movement of the acceptor phase (LLLME/AMAP) techniques are described for the extraction of clenbuterol (CB) in urine. HS-SPME technique involves the extraction of the drug by SPME fibre in a headspace mode with a cooling device at the ...
Mahaveer B. Melwanki +2 more
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