Detector Selection from Two Columns – Valco 4 port valve

This unique configuration allows analysis of different parts of one analysis with two different detectors, without splitting or multiple injections. For example, fixed gases can be analyzed with a thermal conductivity detector, followed by the analysis of a hydrocarbon fraction with a flame ionization detector.

Click below to change the valve position. (Currently shown in Position A)

A: Contents of column to Detector 1

Position A

B: Contents of column to Detector 2

Position B