Agilent InfinityLab LC Series RID User Manual 26
1 Introduction to the Refractive Index Detector
Flow Path
Figure 9 Flow path with the Purge- and Recycle-Valves = ON
NO
NC
*
COM
Purge valve
Recycle valve
COM
NC
NO
Metal union
block
Sample cell
Reference
cell
WASTE
RECYCLE
IN
COM = COMMON
NO = NORMALLY OPEN
COM = NORMALLY CLOSED
Grey lines = flowing path
Black lines = immobilized mobile phase
*
The T-connection in the metal union block results in both sides of the flow cell (sample
and reference) always being exposed to the same pressure