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LCGC Europe-04-01-2008

LCGC Europe

New Technologies

April 01, 2008

New Technologies

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They may come with a hefty price tag but these earphones reportedly take sound onto a new level. Denon's latest AH-C751 earphones cost ?150 but the "Metal Bullet" design uses ultra-rigid machined aluminum that does not resonate, unlike plastic housings used in less expensive products. Denon's "Acoustic Optimiser" balances the sound pressure before and behind the diaphragm to reportedly give greater dynamics and fast transient response. All the contacts are made of gold, as is the 3.5 mm plug. They come with three pairs of ear adapters, a 0.8 m extension cord and rigid travel case.

Modern Countercurrent Chromatography

April 01, 2008

Countercurrent Chromatography

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CCC is an excellent alternative to avoid the problems associated with solid-phase adsorbents, which include irreversible adsorption of sample and the need to replace expensive columns. As a result, CCC is gaining popularity as a purification tool.

Effects of Sample-dissolving Solvent and Sample Ionic Strength in Routine CE Operation

April 01, 2008

CE Currents

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Sample diluent ionic strength, pH, organic solvent composition and viscosity can all have a significant impact on the performance of CE separation. It is, therefore, essential that the choice of solvent is optimized during method development. The optimized diluent should be fully specified in the method and used consistently in method validation and all subsequent applications of the method.