30
Figure 9: Vapor sensor, Light Scattering and Refrective index detectors
CELL / MIRROR END
The sample equilibration tubing is wrapped in a helical groove on the outside diameter of
the RI cylinder block,
Figure 10
. This tubing connects directly into the bottom and top of the
stainless steel cell mounts. The cell mounts consists of a small metal blocks with two stainless
steel tubes protruding through them to hold the cell seals. An anodized black metal cell block
with mounting holes to the RI cylinder block is used to assemble these components. A slit
diaphragm is attached to the inside of the cell block. The slit diaphragm defines the reflected
beam before it leaves the cell on its path back toward the detector The dual RI cell is dropped
into the cell block on top of the lower seal mount containing two TFE seals. Seals are placed on
the upper seal mount and it is placed on top of the cell and then secured in place with a brass
nut.
The concave mirror is mounted (with permanent epoxy adhesive) on the mirror mount,
which in turn is mounted on end of the cell block. A blackened aluminum endcap encases the
entire cell/mirror assembly.
Refractive Index Detector
RALLS/LALLS Detector
RALLS Filter
Vapor
