John V. Hinshaw

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 lcgcedit@lcgcmag.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.

In this instalment John V. Hinshaw reviews gas chromatography instruments and accessories that were newly presented at Pittcon 2012 or were introduced to the marketplace in the preceding year.

The article discusses the fundamentals of instrumentation for headspace sampling, including vial thermostating, pressurization and transfer to the GC inlet.

Here is what to do to bring an idle capillary GC inlet column and detector back to operating condition – including column installation, electronic pneumatic control calibration, system bakeout and basic test mix performance.

Here is what to do to bring an idle capillary GC inlet column and detector back to operating condition – including column installation, electronic pneumatic control calibration, system bakeout and basic test mix performance.

The second part of the series covering the fundamentals of instrumentation for headspace sampling discusses vial thermostating, pressurization and transfer to the gas chromatograph's inlet.

This month the use of fluidic switching devices for open-tubular column manipulations is discussed.

Addresses some of the details of static HSGC theory and practice for conventional liquid-phase headspace samples to better understand and control the analytical processes.

Discussion about the use of gas switching valves for column backflush and two-dimensional series bypass applications.

The 2nd part of this series discusses the use of gas switching valves for column backflushing and 2D series-bypass applications.