Page 108 - Illustrated Pocket Dictionary of Chromatography

INNER DIAMETER (ID) 105

injector valve The component in a liquid chromatograph that
stores a sample until injection, in the loop, and changes the position
of the loop from static to in the flow path on injection.

This is an example of a manual HPLC injector valve. It consists of a port, an injec-
tion lever, a body, a rotor seal, a stator, and a loop.

This is an exploded view of a manual HPLC injector. Left to right: injection lever,
body, rotor seal, stator, and loop. The injector port (see injector port figure) abut-
ting the rotor seal creates a leak proof seal. Both parts need periodic replacement.

inlet The top (head) of a column or the reservoir-side check valve
in a dual-check value pump system.
in-line filter See filter, in-line.

inner diameter (ID) The actual cross-sectional distance across
the open interior of a tube through which mobile phase flows. This is
an important parameter in at least three components: connecting
tubing, column tubing, injector tubing. The volume-length relationship
is shown in the table below.