Sep 1, 2004
By:Bruce Talbert, Robert Benesch, Malik Haouchine, Tracy Jacksier
Four regulators have been compared for use with low-level reactive mixtures. It was verified experimentally that a two-stage low-volume regulator made of stainless steel was suitable for use with hydrogen sulfide...
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Sep 1, 2004
By:Ronald E. Majors
In the course of writing this year's Pittcon coverage of high performance liquid chromatography (HPLC) columns (1,2), I observed that large numbers of columns and packing materials designed for preparative...
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Mar 1, 2003
By:John V. Hinshaw
Gas chromatographers should be concerned about column flow and velocity. Whether selecting a capillary column to meet specific separation requirements, setting up a column in an instrument, or attempting to...
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Jun 1, 2002
By:John V. Hinshaw
In gas chromatography (GC), the chemical choice of mobile phase exhibits essentially no effect upon the degree of peak separation; that is, on the selectivity of the chromatographic system. Changing...
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Mar 1, 2002
By:Jessica Wysocki
The driving force of a liquid chromatography separation is determined by solute partitioning between the mobile and stationary phases. Chromatographers must study a wide range of mobile-phase compositions and stationary-phase...
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