All News

Varian, Inc. has published an application note entitled Enhanced ELSD Sensitivity of Parabens using Sub-Ambient Evaporation. Parabens are widely used as food additives, in personal care products and pharmaceutical formulations. They are relatively volatile but can easily be detected by the Varian ELSD. By manipulating the operating conditions, the Varian ELSD detects semi-volatile parabens, thus conserving sample integrity and providing maximum sensitivity. This application note shows that the innovative design of the Varian ELSD represents the next generation of ELSD technology, providing optimum performance across a diverse range of HPLC applications.

Dionex has entered into an agreement with Caliper Life Sciences to purchase Caliper's AutoTrace line of products...

Top news items in the chromatography field.

Additional upcoming events in the chromatography field.

Incorporating metabolite profiling for absorption, distribution, metabolism, and excretion (ADME) properties early in the drug discovery process has resulted in an increase in drug success in development by reducing failure rates due to poor pharmacokinetic properties (1).

Upcoming educational events in the chromatography field.

Additional education events in the chromatography field.

Italian researchers in Rome (Universita Cattolica and Consiglio Nazionale delle Ricerche) and Cagliari (Universita di Cagliari) have used reversed-phase high performance liquid chromatography with electrospray ionization mass spectrometry to analyze naturally occurring salivary peptides from subjects with autism and compare the profiles with those obtained from age-matched control subjects.

Researchers from Sun Yat-sen University and South China Normal University (both in Guangzhou, China) developed a sample preparation method for extracting the beta-blockers propranolol, atenolol, pindolol, and alprenolol from human plasma and urine samples.

David Ericson and Michal Lipson of Cornell University (Ithaca, New York) have a designed an optofluidic system that uses the pressure of light to move and manipulate biological molecules.

Bruker Corp (Billerica, Massachusetts) has developed a homeland security division, Bruker Detection, and a benchtop instrument for the detection of traces of explosives or drugs.

Researchers from Stockholm University (Stockholm, Sweden) and Nankai University (Tianjin, China) used a serial mixed-mode cation-exchange and anion-exchange solid-phase extraction (SPE) method to extract 15 basic, neutral, and acidic pharmaceutical compounds from wastewater.

The Pittsburgh Conference (Pittsburgh, Pennsylvania) announced that the topic of its 20th annual James L. Waters symposium will be near-infrared spectroscopy.

A research group from the University of Tehran (Tehran, Iran) used dispersive liquid?liquid microextraction coupled with gas chromatography to determine compounds in rose water, which is the hydrosol portion of the distillate of rose petals.

PerkinElmer Inc. (Waltham, Massachusetts) has acquired Arnel Inc. (Parlin, New Jersey), a custom producer of GC technologies for the petrochemical, food and beverage, and industrial hygiene markets.

Chiral Technologies Europe (Illkirch Cedex, France), a wholly owned subsidiary of DAICEL Chemical Industries, announced the acquisition of ChromTech Ltd. (Congleton, UK).

Scientists from the Swedish University of Agricultural Sciences (Uppsala, Sweden) and the University of Tabriz (Tabriz, Iran) developed a single-step solid-phase extraction (SPE) method to completely separate sterol oxidation products in food lipids.

Researchers from Universidad de Santiago de Compostela (Santiago de Compostela, Spain) developed a dispersive liquid-liquid microextraction sample preparation method to determine the antibacterial agent triclosan and its environmental transformation product methyl triclosan in water samples.

Polysaccharide-based chiral stationary phases (CSP) are widely used due to their wide chiral recognition ability. Several cellulose and amylose derivatives are extremely effective in the separation of a wide range of compounds of interest in the pharmaceutical industry.1 This work demonstrates the different chiral recognition capabilities of CSPs based on cellulose tris(3-chloro-4-methylphenylcarbamate) and cellulose tris(3,5-dimethylphenylcarbamate). Over 180 racemates of pharmaceutical interest were analysed on these two phases in normal (NP), polar-organic (PO) and reversed phase (RP) separation modes. Numerous examples including important classes of drug compounds as well as statistical data prove that cellulose tris(3-chloro-4 methylphenylcarbamate) offers a good alternative to the commonly used cellulose tris(3,5-dimethylphenylcarbamate) in the separation of difficult racemic mixtures.

Waters Corporation claims that by replacing traditional high performance liquid chromatography (HPLC) with its ACQUITY UltraPerformance LC (UPLC), acetonitrile consumption could be reduced by at least 70% without compromising productivity and performance.

Collaboration between MIP Technologies AB and sanofi-aventis has been announced, with the aim of developing molecularly imprinted polymers (MIPs) for the analysis of pharmacologically active peptides from plasma samples.

Hypercrosslinked polystyrene-type (solid-phase extraction) SPE materials exhibit a unique ability to enter pi-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.

This month E-Separations Solutions' Technology Forum looks at the topic of sample preparation and the trends and issues surrounding it. Joining us for this discussion are Tom Hall of Fluid Management Systems; Luke Roenneburg of Gilson, Inc.; and Ron Majors of Agilent Technologies.

Our work focuses on the synthesis of branched (functionalized) polydienes via a facile two-step synthesis. Despite the numerous strategies developed for the preparation of branched polymers in recent years, there is still a limited number of simple synthetic strategies based on common vinyl monomers.

A research group from the South China University of Technology (Guangzhou, Guangdong, China) and the Georgia Institute of Technology (Atlanta, Georgia) used a full evaporation headspace gas chromatography method to determine ethanol in fermentation liquor.

Researchers from the University of the Basque Country (Bilbao, Spain) have compared two extraction techniques as preparation methods for analyzing organic pollutants polycyclic aromatic hydrocarbons, polychlorinated biphenyls, phthalate esters, nonylphenols, polybrominated biphenyls, and polybrominated diphenyl ethers in water samples.

Researchers from Bucknell University (Lewisburg, Pennsylvania) used electrophoretically mediated microanalysis in a capillary tube to perform a Jaffe reaction between creatinine and picrate.

Researchers from the Swedish University of Agricultural Sciences (Uppsala, Sweden) and the University of Tabriz (Tabriz, Iran) developed a solid-phase extraction method to separate sterol oxidation products in food lipids for analysis by gas chromatography (GC) and GC?mass spectrometry.

Metrohm UK (Buckingham, UK) has developed a method for analyzing samples of beer and intermediates for anions and cations ? alkali and alkaline earth metals ? using ion chromatography and voltammetry.

Scientists at the National Institute of Standards and Technology (NIST, Gaithersburg, Maryland) have developed a multiplexed capillary electrophoresis system and technique for high-throughput separations.