Teledyne Tekmar

A Comparison of Volatile Organic Compound Response When Using Nitrogen as a Purge Gas

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Abstract
For many years Helium has been the gas of choice for purging Volatile Organic Compounds (VOCs). However, in the past few years, the price and demand for helium gas has increased substantially, thus making the use of Helium for the purge gas in Purge and Trap (P&T) very expensive. The expense of Helium has provoked interest in finding a viable alternative purge gas. This application note investigates VOC compound responses when purged using Helium and Nitrogen in order to validate Nitrogen as a possible alternative to Helium for P&T applications.

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