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).
Thermo Fisher Scientific Launches Melamine Analysis Program
December 15th 2008In response to the recent alert issued by the U.S. Food and Drug Administration, Thermo Fisher Scientific (Waltham, Massachusetts) has initiated a program focused on assisting government and commercial food testing laboratories in developing and implementing methods for analyzing melamine in food products imported from China.
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.
TSK-GEL Amide-80 HILIC Columns for the Analysis of Melamine and Cyanuric Acid in Milk by LC-MS/MS
December 8th 2008Melamine is an organic base and a trimer of cyanamide, with a 1,3,5- triazine skeleton. Melamine can react with formaldehyde to produce melamine resin, a very durable thermosetting plastic, and melamine foam, a polymeric cleaning product.
Additional Studies in the Separation of PEGylated Proteins by Reversed Phase Chromatography
December 5th 2008Additional studies were undertaken to better understand the chromatographic behavior of PEGylated proteins in an effort to improve purification and characterization techniques of such proteins.
Technology Forum: Capillary Electrophoresis
December 2nd 2008This month E-Separations Solutions' Technology Forum looks at the topic of capillary electrophoresis and the trends and issues surrounding it. Joining us for this discussion is Tobias Preckel of Agilent Technologies; Susan Darling of Beckman Coulter, Inc.; and Frank A. Gomez of California State University.
Additional Studies in the Separation of PEGylated Proteins by Reversed Phase Chromatography
December 2nd 2008Additional studies were undertaken to better understand the chromatographic behavior of PEGylated proteins in an effort to improve purification and characterization techniques of such proteins.
A Hydrophilic Interaction Chromatography Method for the Purity Analysis of Cytosine
December 1st 2008Cytosine (chemical name 4-amino-2-hydroxypyrimidine) is a pyrimidine derivative with a hetereocyclic aromatic ring and two substituents (amine and keto groups) attached and is a polar compound of significant biological and pharmaceutical interest. In response to the intended use of bulk cytosine as a raw material in pharmaceutical manufacturing, a method for the determination of the purity of cytosine was developed.