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Hillsboro, OR, United States

Hinshaw J.V.,Serveron
LCGC North America | Year: 2014

Have you wondered how the gas chromatography (GC) carrier gases helium, hydrogen, argon, and nitrogen are transformed from their natural conditions or precursors into highly purified compressed states inside laboratory gas cylinders or generators? Here, we track the genesis of the top four carrier gases before they start their journey through a GC system. © 2014 Advanstar Communications, Inc. All rights reserved. Source

Hinshaw J.V.,Serveron
LC GC Europe | Year: 2014

This month's instalment discusses the laboratory deployment of gas cylinders with appropriate pressure regulators, gas filtration, and gas fittings, as well as the question of cylinder retirement. Source

Hinshaw J.V.,Serveron
LC-GC Europe | Year: 2015

In gas chromatography (GC) split injection systems, as much as 99% or more of the injected sample never enters the column: It is released downstream of the inlet where it can encounter and possibly perturb precision gas control devices. The split-vent trap acts to prevent or at least moderate such effects. This month’s instalment addresses the operation and maintenance of split-vent traps. © 2015 Advanstar Communications Inc. All rights reserved. Source

Hinshaw J.V.,Serveron
LC-GC Europe | Year: 2015

The term dead volume often comes up in chromatography discussions and literature. This month we address the nature of this phenomenon, when it can become a problem that affects chromatographic results, and how to understand and take control of it. © 2015 Advanstar Communications Inc. All rights reserved. Source

Serveron | Date: 2011-11-15

A method for extraction of gas from liquid provides for reliable and accurate extraction of gases dissolved in fluids and routing the extracted gas to an analytical instrument. An extraction module comprises one or more fluorosilicone membranes molded into the shape of a flattened disk. The membranes are retained in a housing in a spaced apart relationship. The membrane is permeable to target gas(es), but not to the fluid. Porous support members support the membranes and prevent damage to them and the housing defines separate fluid flow paths for the fluid and the gas extracted from it. Fluid is passed over the membrane in a first fluid phase; target compounds in the fluid diffuse across the membrane to a second fluid phase until equilibrium is achieved.

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