Search

Focuses on the offer of high separation power by modern planar chromatographic techniques. Application of two-dimensional planar arrangements, chromatoplates with different properties; Potential of multidimensional planar chromatographic techniques.

Focuses on the development of column switching in liquid chromatography (LC) in many configurations. Discrimination of precolumn switching from coupled-column; Packing of precolumns with materials of larger particle size; Evidence of the high separation power of the analytical column of LC.

Focuses on separation efficiency of capillary gas chromatography, complemented by hardware and detectors. Complexity of resolution on any chromatographic phase; Exacerbation of compounds present at trace amounts; Use of selective element specific detectors for positive compound identification.

Features products that can be used by separation scientists and are available in the market, as of December 2002. Viscometry; Demonstration program for the Cirrus GPC software of the Polymer Laboratories; Column for monosaccharide analyses.

Describes the preparation of lauryl, octadecyl and isobornyl methaacrylate capillary columns. Scheme of preparation; Description of polymerization mixtures; Comparison of the efficiencies of the columns obtained using different polymerization mixtures.

Part I. Examines the principal hazards and safety issues surrounding the compressed gas cylinder. Rocket potential; Atmospheric displacement; Tendency for gas cylinders to explode; Toxicity.

Describes columns for reversed-phase liquid chromatography separations in highly aqueous mobile phases. Introduction of modified surfaces in reversed-phase chromatography; Use of non-endcapped, short-chain alkyl phases.

Part I. Discusses the meaning of hydrogen-ion concentrations in partially aqueous mobile phases. Measurement of the aqueous hydrogen-ion concentration; Change in junction potential; Change in auto protolysis constant.

Discusses the development of a system for automated off-line packed column supercritical fluid chromatography for characterization of triglycerides (TGs) in vegetable oils. Separation of the TGs according to degree of saturation; Use of silver-loaded stationary phase for separation in the second dimension; Offer of information on TG composition of vegetable oils from orthogonal separation mechanisms.

A RP-HPLC method was developed for the analytical separation of 13-blockers using the Atlantis T3 column. The separation was then directly scaled to the preparative dimension, where up to 280 mg was loaded in a single injection using 100% aqueous conditions. [ABSTRACT FROM AUTHOR]

Reports on the advantage of two-dimensional gas chromatography for separation of complex mixtures. Separation of the sample on a first capillary column; Distribution of sample molecules over a limited space; Optimization of the frequency of modulation.

Provides information on brochures of chemical companies, published as of December 2002. Thermo Finnigan; Metrohm IC; Alltech; PerkinElmer Instruments.

Presents some non-book materials on separation technology. Brochure on integrated archival and database system developed by Chesire, England-based Thermo LabSystems; Product catalogue of Knauer GmbH of Berlin, Germany; Handbook developed by Polymicro Technologies Inc.

BEH Technology™, the second generation of patented organic/inorganic hybrid particle technology (HPT), is the new benchmark for HPLC columns. Waters XBridge™ Prep columns reach a new level of maximum loadability and direct scalability. [ABSTRACT FROM AUTHOR]

Reports that the Dublin, Ireland-based Ultrasonic Scientific Ltd., has increased its customer and technical support and its research and development personnel to meet its expanding workload.

Reports that Hubb Bock was appointed by the Polymer Laboratories as its European specialist who will support its systems for high temperature GPC and its rapid polymer screening product range.

Reports that the Viscotek Europe, supplier of gel permeation chromatography, viscometry instrumentation and software for macromolecular characterization, has opened its office in Lyon, France.

Reports that the Edinburgh University has agreed to extend its contract for a further two years with laboratory equipment supplier Fisher Scientific.

Reports that Koichi Tanaka has been awarded the 2002 Nobel Prize in Chemistry for the development of soft desorption ionization methods in mass spectrometric analyses of biological macromolecules.

Discusses the suggestion made by the American, European and Japanese pharmacopoeias on hot to calculate the asymmetry of chromatographic peaks. Interpretation of the quotient as the observed width of the peak divided by what would have been determined if no asymmetry occurred; Assessment of the validity of the calculation.