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The best approach is to document everything for each hardware configuration as a separate method and then qualify and validate them for each sample or category of sample.

Dowload the presentations from the February 9th Webinar on Perchlorate in the Environment.

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News All the news from February 2005 Opinion Our columnist, Zosimus, ponders the question of why micro devices in the separation science industry have been a long time in coming. Market trends & analysis Glenn Cudiamat provides a review of the European and North American GC-MS markets. HPLC and LC-MS analysis of Simvastatin Mark Woodruff, of Thermo, discusses the implications of moving pharmaceuticals to over-the-counter status, in terms of ensuring that a suitable analytical method is obtained. Q&A Georges Gauthier and Martin Greiner from Agilent Technologies answer questions on the company's chip technology - the latest branch of separation science.

The development of a method for the simultaneous determination of glycine, triglycine and fructose using UV/vis and evaporative light-scattering is presented. The study formed part of a research project dealing with the recovery of functional peptides from aqueous streams on an industrial scale using absorption or related technologies.

Liquid chromatography is a crucial process used in making a quickly expanding range of biotech products such as human insulin and cancer-fighting drugs. Located in one of the newer buildings at Pease International Tradeport (Portsmouth, New Hampshire), Euroflow represents a new breed of biotech-related companies that have emerged recently throughout the region.

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The second part in this series focuses on the variables in large data tables, looking at the vocabulary used by PCA experts, and explaining some of the background to the method. It further provides practical examples of how these variables operate in practice.

News All the news from January 2005 Opinion Our columnist, Zosimus, sparks some interesting debate on chromatography issues. Market trends & analysis Glenn Cudiamat provides an insight into the status of the current LC-MS market. Country focus From new appointments to new launches, this French focus will keep you a la page with what's happening in France. Q&A Geof Wyatt of Wyatt Technology provides an interesting interview on light-scattering matters.

In this article, the author describes the development of a simple enzymatic reactor, which also functions as a microdevice that combines both preconcentration and enzymatic digestion in the nano-electrospray emitter, and its interfacing with a mass spectrometer.

In last month's installment of "GC Connections," John Hinshaw discussed how peak retention times depend upon relationships between pressure, flow rate, oven temperature, column dimensions, and stationary phase. This concluding installment of a two-part series discusses the effects that column variability has on isothermal capillary gas chromatography and explores instrument calibration with the goal of maximizing instrument-to-instrument similarity of retention times.

The effects of temperature on HPLC are explored, along with a critical analysis of the effects of temperature change on both peak shape and efficiency.