KIN-TEK Permeation Tubes

Permeation - Overview

Why use Kin-Tek Permeation Tubes?
The purpose of a calibration gas standard is to establish accurate reference points for the verification of an analysis. Static mixtures in gas cylinders are often unreliable and inaccurate at the levels (ppm-ppb) that analytical technology now demands. In gas cylinders containing low level mixtures, the trace components often adsorb on to, or react with, the cylinder walls causing the standard to be inaccurate and unreliable. Also, it may be impossible to get matrix gas that is completely free of the trace component, thus making it impossible to get a true reference point with a cylinder mixture. These problems are solved by using permeation tubes ("The Permeation Tube Method") in lieu of gas cyclinders.

Click here to see how KIN-TEK Trace Source™ permeation tubes work.

To learn more, read the following PDF document titled "Permeation Tubes: A simple Path to Very Complex Gas Mixtures."

Types of Trace Source™ Permeation Tubes
KIN-TEK manufacturers both disposable and refillable permeation tubes for about 500 chemicals. Disposable permeation tubes are about the size of a pencil and contain the liquid phase of a component compound. This compound slowly permeates through a polymer membrane and generates a constant emission rate when maintained at a constant temperature.

Refillable permeation tubes have a broader range of concentration than the disposable tubes and are recommended for long-term and special applications requiring a broad range of calibration points. These tubes are available for chemicals that are not suitable for disposable tubes and are periodically refilled with component gas using the controls in one of many types of KIN-TEK Gas Standards Generators.

Click here for more reasons to use KIN-TEK permeation tubes.