John V. Hinshaw is senior staff engineer at Serveron Corp., Hillsboro, Oregon, and a member of LCGC's editorial advisory board. Direct correspondence about this column to "GC Connections," LCGC, Woodbridge Corporate Plaza, 485 Route 1 South, Building F, First Floor, Iselin, NJ 08830, e-mail email@example.com. For an ongoing discussion of GC issues with John Hinshaw and other chromatographers, visit the Chromatography Forum discussion group at http://www.chromforum.com.
Have you wondered how your GC system sets and controls gas pressures, flows, and carrier gas velocities electronically? Here, we describe the requirements for and the operation of electronic gas control systems for GC columns and detectors.
In this instalment, John Hinshaw discusses the laboratory deployment of gas cylinders with appropriate pressure regulators, filtration, and gas fittings, as well as the question of cylinder retirement.
Safe and effective gas cylinder setup and use requires the right pressure regulators, fittings, tubing, and filters as well as careful attention to procedure. This month's instalment reviews how to get the best results from laboratory gas cylinders, how pressure regulators work, and what filters should be installed in gas lines.