Results 241 to 250 of about 528,026 (297)

Gas flow headspace liquid phase microextraction

Journal of Chromatography A, 2009
There 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, Jinxue, Qiu, Chunyan, Ren, Xiangfan, Piao, Xifeng, Li, Xue, Wu, Donghao, Li   +6 more
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A deep eutectic solvent based liquid phase microextraction for the determination of caffeine in Turkish coffee samples by HPLC-UV

Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment, 2020
A novel liquid-phase microextraction procedure for the determination and extraction of caffeine using a deep eutectic solvent based liquid-phase microextraction method (DES-LPME) was developed.
Sezen Sivrikaya
semanticscholar   +1 more source

Chemical reactions in liquid-phase microextraction

Journal of Chromatography A, 2009
In recent years, liquid-phase microextraction (LPME), a microscale implementation of liquid-liquid extraction, has become a very popular sample pretreatment technique because it combines extraction and enrichment, and is inexpensive, easy to operate and nearly solvent-free.
Li, Xu, Chanbasha, Basheer, Hian Kee, Lee   +2 more
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Ultrasound Assisted Ferrofluid Dispersive Liquid Phase Microextraction Coupled with Flame Atomic Absorption Spectroscopy for the Determination of Cobalt in Environmental Samples

, 2020
This study proposes a novel deep eutectic solvent based-ferrofluid to develop a dispersive liquid phase microextraction method. The efficiency of the protocol was evaluated by determining the trace levels of Co (II) from environmental water samples by ...
Amin Ghasemi, M. R. Jamali, Z. Es’haghi   +2 more
semanticscholar   +1 more source

Nanoparticle-enhanced liquid-phase microextraction

TrAC Trends in Analytical Chemistry, 2015
Abstract 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, Isabel Costas-Mora, Vanesa Romero, Isela Lavilla   +3 more
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Self-assembled supramolecular dispersive liquid-phase microextraction for concentration and determination of anthraquinone compounds in Rhubarb.

Journal of Separation Science, 2020
The self-assembled supramolecular dispersive liquid-phase microextraction combined with high-performance liquid chromatography was developed and introduced for simultaneous extraction and determination of the trace level rhein, chrysophanol and physcion ...
Xuan Chen, D. Tie, An-Ni Li, Shuang Hu, Xiao-ping Bi, X. Bai   +5 more
semanticscholar   +1 more source

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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Hollow Fiber Liquid-Phase Microextraction

2012
This chapter discusses hollow fiber liquid-phase microextraction (LPME). The chapter comprises a short discussion of the basic setup and principles for LPME, and the historical development. The theory of LPME is also discussed including equations for extraction recoveries and extraction kinetics.
Gjelstad, A., Rasmussen, K. E., Pedersen-Bjergaard, S.   +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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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
openaire   +1 more source