Results 171 to 180 of about 29,757 (224)

In-vessel headspace liquid-phase microextraction

Analytica Chimica Acta, 2021
A new mode of headspace liquid-phase microextraction termed in-vessel headspace liquid-phase microextraction (IV-HS-LPME) has been developed. A plastic vessel was used as a holder for an extraction phase. Problems with drop stability, limitations in the stirring speed, and too little volume of the acceptor phase have been completely eliminated.
Aimad-Eddine Tamen, Andriy Vishnikin
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Liquid-phase microextraction

TrAC Trends in Analytical Chemistry, 2010
Abstract The development of faster, simpler, inexpensive and more environmentally-friendly sample-preparation techniques is an important issue in chemical analysis. Recent research trends involve miniaturization of the traditional liquid-liquid-extraction principle by greatly reducing the acceptor-to-donor ratio.
Ali Sarafraz-Yazdi, Amirhassan Amiri
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Ferrofluid-based liquid-phase microextraction

Journal of Chromatography A, 2010
A new mode of liquid-phase microextraction based on a ferrofluid has been developed. The ferrofluid was composed of silica-coated magnetic particles and 1-octanol as the extractant solvent. The 1-octanol was firmly confined within the silica-coated particles, preventing it from being lost during extraction.
Shi, Z.-G., Zhang, Y., Lee, H.K.
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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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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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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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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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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 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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