The internal sample (fixed volume) flowpath is used when very small volumes are required. The sample size is determined by a passage engraved on the valve cap, allowing precise, repeatable injections.
In Position A, the sample flows through the sample passage while the mobile phase flows through to the column. In Position B, the sample passage is in line with the column and the carrier injects the contents of the sample passage onto the column.
Click below to change the valve position. (Currently shown in Position A)
A: Fill internal sample slot
B: Inject contents of internal sample slot