May 3rd 2024
Elia Psillakis from the Technical University of Crete, Greece presents an update on the latest developments on sustainability and separation science.
December 14th 2023
The Unique Selectivity of π-Interactions for Solid-Phase Extraction
January 1st 2009Hypercrosslinked polystyrene-type (solid-phase extraction) SPE materials exhibit a unique ability to enter p-interactions with aromatic, heterocyclic and unsaturated compounds. This property permits selective extraction and pre-concentration of the above classes of species from non-polar media and fatty matrices. The principle has been exploited for developing analytical protocols to determine polar furan derivatives in mineral transformer oil, polyaromatic hydrocarbons (PAHs) in smoked fish and for the fractionation of polychlorinated aromatic compounds in environmental matrices.
Microwave-Induced Combustion Digestion of Petroleum Coke Samples
December 15th 2008Researchers at Universidade Federal de Santa Maria (Santa Maria, Brazil) and Centro de Pesquisas e Desenvolvimento Leopold Americo Miguez de Mello-CENPES/PETROBAS (Rio de Janeiro, Brazil) analyzed chloride in petroleum coke samples using microwave-induced combustion followed by ion chromatography.
Headspace SPME Used in Chlorophenols Analysis
December 15th 2008Researchers from National Chung Hsing University (Taichung, Taiwan) analyzed four chlorophenols in aqueous samples using purge-assisted headspace solid-phase microextraction (SPME) followed by gas chromatography?mass spectrometry (GC?MS).
Instant Controlled Pressure Drop Used in Oligosaccharide Analysis
December 15th 2008A research group from LMTAI (La Rochelle, France) and LVMH Recherche (St. Jean de Braye Cedex, France) analyzed the oligosaccharides ciceritol and stachyose extracted from Tephrosia purpurea seeds using an instant controlled pressure drop pretreatment before solvent extraction.
Sonication-Assisted Extraction of Parabens in Environmental Samples
December 15th 2008Scientists from INIA (Madrid, Spain) used ultrasonic-assisted extraction followed by liquid chromatography with triple-quadrupole mass spectrometry detection (LC?MS) to analyze paraben compounds in environmental solid samples.
A Highly Sensitive Method for the Analysis of Tamsulosin (Flomax) in Human Plasma
December 2nd 2008A highly sensitive analytical method for the analysis of tamsulosin in human plasma has been developed for use in bioanalytical studies. The solid-phase extraction (SPE) and UPLC–MS–MS methodologies are described, as well as performance against validation parameters.
Dispersive Liquid-Liquid Microextraction GC Method
December 1st 2008Researchers from National Tsing Hua University (Hsinchu, Taiwan) developed a dispersive liquid?liquid microextraction (DLLME) method based on solidification of a floating organic drop and combined it with gas chromatography with either electron-capture or mass spectrometry detection.
SPE of Pesticides from Fruit Juices with Carbon Nanotubes
December 1st 2008A research group from the University of La Laguna and ICIA (both in La Laguna, Tenerife, Canary Islands, Spain) used multiwalled carbon nanotubes as a solid-phase extraction (SPE) medium for extracting eight organophosphorus pesticides from various commercial apple, grape, orange, and pineapple juices.
SPME-GC-MS Analysis of Virgin Olive Oils
December 1st 2008Researchers from the University of Barcelona (Barcelona, Spain) and Arboriculura Mediterranea Mas de Bover (Tarragona, Spain) implemented a factorial experimental design in developing a solid-phase microextraction (SPME)?gas chromatography (GC)?mass spectrometry (MS) method to analyze volatile phenols in virgin olive oils.
Carbon Nanotubes Used as SPME Medium for Aniline Compounds
December 1st 2008Scientists from Lanzhou University (Lanzhou, China) developed an automated on-line method for determining substituted aniline compounds that consisted of in-tube solid-phase microextraction (SPME) with oxidized multiwalled carbon nanotubes coated on the outside surface of the SPME fiber, which was inserted into PEEK tubing attached to a six-port injection valve.
Dionex Agrees to Purchase Caliper Life Sciences SPE Products
November 15th 2008Dionex (Sunnyvale, California) has agreed to purchase Caliper Life Sciences? (Hopkinton, Massachusetts) AutoTrace solid-phase extraction (SPE) products, including the AutoTrace SPE workstation, which is designed to automate the extraction of large-volume aqueous samples before analysis.
The Role of Polymers in Solid-Phase Extraction and Sample Preparation
November 1st 2008This installment of SPP will compare and contrast the various types of polymeric and non-polymeric sorbents. The major advantages or polymeric sorbents will be discussed, and some applications will illustrate the versatility of polymeric SPE.
Liquid-Liquid Microextraction of Haloacetic Acids in Drinking Water
November 1st 2008Researchers from the University of Córdoba (Córdoba, Spain) studied the use of simultaneous liquid-liquid microextraction and methylation along with headspace gas chromatography-mass spectrometry to determine nine haloacetic acids in drinking water.
SFE Used to Recover Aflatoxin from Soil
November 1st 2008Researchers from US EPA National Exposure Research Laboratory (Research Triangle Park, North Carolina) and East Carolina University (Greenville, North Carolina) used supercritical fluid extraction (SFE) to recover aflatoxin B1 from fortified soil.
SBSE in the Analysis of Pharmaceuticals in Water
November 1st 2008A research group from the University of Lisbon (Lisbon, Portugal) studied the use of stir-bar sorptive extraction (SBSE) with polyurethane and polydimethylsiloxane polymeric phases and high performance liquid chromatography with diode-array detection for the analysis of six acidic pharmaceutical compounds in environmental water matrices such as river, sea, and wastewater samples.
Weed Killer Analyzed Using Molecularly Imprinted Polymer
October 15th 2008A research group from BRGM (Orleans, France) and Ecole Superieure de Physique et de Chimie Industrielles (Paris, France) used terbutylazine molecularly imprinted polymers following a pressurized liquid extraction step to remove interfering compounds from soil extracts containing the herbicide atrazine.
Stoichiometrically Imprinted Polymer SPE of Fluoroquinolones
October 15th 2008Researchers from Universidad Complutense de Madrid (Madrid, Spain) and Universität Dortmund (Dortmund, Germany) used a molecularly imprinted polymer (MIP) solid-phase extraction method in the analysis of fluoroquinolone antibiotics in environmental water samples.
Monolithic Spin Column Extraction of Amphetamines
October 15th 2008Researchers from Hiroshima University (Hiroshima, Japan), Hiroshima Prefectural Police Headquarters (Hiroshima), Tokai University School of Medicine (Kanagawa, Japan), and GL Sciences Inc. (Saitama, Japan) developed a spin column device packed with octadecyl silane-bonded monolithic silica for extracting amphetamines and methylenedioxyamphetamines from urine.
SBSE Used in Triclosan Analysis
October 15th 2008Scientists from Hoshi University (Tokyo, Japan) and the National Research Institute of Police Science (Chiba, Japan) employed stir-bar sorptive extraction (SBSE) and thermal desorption gas chromatography?mass spectrometry (GC?MS) for analyzing 5-chloro-2-(2,4-dichlorophenoxy)phenol, otherwise known as triclosan, in river water samples.