Articles by John Hinshaw - Chromatography Online
Articles by John Hinshaw

John Hinshaw

Helium Crisis or Helium Hype?
November 7, 2012

John Hinshaw offers his insights into how the current helium shortage will affect gas chromatographers and answers some concerns of The Column readers selected from the CHROMacademy Forum.

Gases Q & A
November 1, 2012

A number of frequently asked questions about gases and their delivery to a gas chromatography instrument are addressed.

Solid-Phase Microextraction
October 1, 2012

In this month's installment, John Hinshaw discuses solid-phase micro extraction.

Solid-Phase Microextraction (SPME)
October 1, 2012

SPME decouples sampling from matrix effects that would distort the apparent sample composition or disturb the chromatographic separation. It is also easy to use and reduces solvent consumption.

New Gas Chromatography Products at Pittcon 2012
May 1, 2012

A review of gas chromatography instruments and accessories presented at Pittcon 2012

Restoration Work
March 1, 2012

For smooth operation, follow this step-by-step guide.

Valves for Gas Chromatography Part III: Fluidic Switching Applications
November 1, 2011

How to use fluidic switching devices for open-tubular column manipulations, such as heartcutting and comprehensive multidimensional GCxGC.

Headspace Sampling
October 1, 2011

A clear understanding of the chemical system of the sample in headspace — and how temperature and peak volume affect peak areas, sensitivities, and repeatability — will improve headspace analysis.

Hydrogen Carrier Gas and Vacuum Compensation
January 1, 2011

John Hinshaw investigates the influence that choosing hydrogen carrier has on column selection and operation with direct-interface GC?MS.


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