Results 21 to 30 of about 7,149,709 (340)

Solid-phase extractions in flow analysis [PDF]

Anais da Academia Brasileira de Ciências, 2018
Coupling solid-phase extraction (SPE) to flow systems has promoted a synergistic development. Whereas SPE mechanization leads to improved precision and higher sample throughput, as well as diminishes systematic errors and contamination risks, analyte concentration and separation from the sample matrix provides a remarkable impact on detectability and ...
ROCHA, FÁBIO R.P., BATISTA, ALEX D., MELCHERT, WANESSA R., ZAGATTO, ELIAS A.G.   +3 more
openaire   +5 more sources

Extração em fase sólida (SPE) e micro extração em fase sólida (SPME) de piretróides em água Solid-phase extraction (SPE) and solid-phase microextraction of pyrethroids in water

Química Nova, 2001
The pyrethroids bifenthrin, permethrin, cypermethrin and deltamethrin were extracted by solid phase extraction (SPE) and solid phase microextraction (SPME).
Wilma Regina Barrionuevo, Fernando Mauro Lanças   +1 more
doaj   +1 more source

Selective extraction of Ascorbic acid by molecular imprinted polymer solid-phase extraction [PDF]

Journal of Chemistry Letters, 2022
A Highly sensitive and selective molecular imprinted polymer (MIP) was synthesized for solid phase extraction and preconcentration of trace amount of Ascorbic acid (AA).
Leila Baramakeh
doaj   +1 more source

Recent advances in accelerating solid-phase extraction

Journal of Chromatography Open
With the growing demand for rapid processing of laboratory samples, great efforts have been dedicated to improving the speed and throughput of solid phase extraction (SPE), a widely used sample pretreatment technique.
Jingwei Zhou, Yuexiang Chang, Hao Tian, Jia-Huan Qu, Qiqin Wang, Jincai Wang, Zhengjin Jiang   +6 more
doaj   +1 more source

Magnetic Solid-Phase Extraction of Organic Compounds Based on Graphene Oxide Nanocomposites

Molecules, 2020
Graphene oxide (GO) is a chemical compound with a form similar to graphene that consists of one-atom-thick two-dimensional layers of sp2-bonded carbon. Graphene oxide exhibits high hydrophilicity and dispersibility.
N. Manousi, E. Rosenberg, E. Deliyanni, G. Zachariadis, V. Samanidou   +4 more
semanticscholar   +1 more source

A one dimensional model for the prediction of extraction yields in a two phases modified twin-screw extruder [PDF]

, 2002
Solid/liquid extraction is performed on raw plant substrate with a modified twin-screw extruder (TSE) used as a thermo-mecanochemical reactor. Visual observations and experimental residence time distributions (RTD) are used to develop a solid transport ...
Prat, Laurent E., Guiraud, Pascal, Prat, Laurent, Gourdon, Christophe, Rigal, Luc   +4 more
core   +1 more source

Development and Validation of HPLC Method for Determination of Crocetin, a constituent of Saffron, in Human Serum Samples [PDF]

Iranian Journal of Basic Medical Sciences, 2013
Objective(s):The present study reports the development and validation of a sensitive and rapid extraction method beside high performance liquid chromatographic method for the determination of crocetin in human serum. Materials and Methods:The HPLC method
Amir Hooshang Mohammadpour, Mohammad Ramezani, Nasim Tavakoli Anaraki, Bizhan Malaekeh-Nikouei, Sara Amel Farzad2, Hossein Hosseinzadeh   +5 more
doaj  

Solid–liquid transport in a modified co-rotating twin-screw extruder-dynamic simulator and experimental validations [PDF]

, 2004
This work presents a dynamic transport model of a solid–liquid media through a twin-screw extruder (TSE). The application under consideration is the solid–liquid extraction of solute from raw plant substrate.
Prat, Laurent E., N'diaye, Senghane, Prat, Laurent, Gourdon, Christophe, Rigal, Luc   +4 more
core   +1 more source

Overview of Liquid Sample Preparation Techniques for Analysis, Using Metal-Organic Frameworks as Sorbents

Molecules
The preparation of samples for instrumental analysis is the most essential and time-consuming stage of the entire analytical process; it also has the greatest impact on the analysis results.
Jakub Woźniak, Jakub Nawała, Daniel Dziedzic, Stanisław Popiel   +3 more
doaj   +1 more source

Application of Sorbent-Based Extraction Techniques in Food Analysis

Molecules, 2023
This review presents an outline of the application of the most popular sorbent-based methods in food analysis. Solid-phase extraction (SPE) is discussed based on the analyses of lipids, mycotoxins, pesticide residues, processing contaminants and flavor ...
Natalia Drabińska, Monika A. Marcinkowska, Martyna N. Wieczorek, Henryk H. Jeleń   +3 more
doaj   +1 more source