Sample injection and heart cut to detector

Two position valve application – 10 port valve
(Non-Java)

Sample is injected onto the analytical column. The front cut elutes from the column and goes to vent (at port 5). The valve is then switched, and the heart cut is backflushed to the detector. Once the heart cut has eluted, the valve is switched again, sending the end cut to waste.

By delaying the switching times, the front and heart cuts could go to waste, with the end cut going to the detector.

Further reference

More applications with two position valves
Valco injectors and valves
Cheminert injectors and valves