January 2012

Process Engineering

How to manage vaporization in an analytical system

When done properly, this process ensures that all compounds vaporize at the same time, preserving the sample’s composition

Nordstrom, D., Waters, T., Swagelok Company

If the analyzer in your analytical system requires gas but your sample is liquid, the only option is to convert the liquid to gas. This process is called vaporization or flash vaporization. The objective is to convert a sample of all liquid to all vapor instantly, without changing the composition. It is not easy to vaporize a sample, nor is it always possible, so make sure it is really necessary and possible before you try. You should always analyze a liquid in a liquid phase unless there are strong reasons for analyzing in a vapor phase. If you proceed with vaporization, it is important to understand the difference between evaporation and vaporization. Evaporation occurs gradually with

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