182
Glossary
angular axis: the direction describing the rotation (clockwise and
counterclockwise) of the tray’s arm. The tray uses this motion to place the vial
gripper above a group of five vials or in the proper orientation to the bar code
reader or injector turret. It also uses this motion to engage or disengage the vial
gripper’s claw around the neck of the vial. See also home positions.
bleed: see septum bleed.
bottle: the 4 ml glass bottles placed in the injector turret to hold solvent or
waste. See vial.
capillary column: modern capillary columns are divided into two classes:
high resolution and low resolution. The low resolution columns have internal
diameters of 0.4 mm to 0.75 mm. The high resolution columns have internal
diameters of 0.1 mm to 0.4 mm.
configuration: the specific arrangement of automatic liquid sampler modules,
gas chromatograph, and data handling devices to operate as a system.
cool on-column: an injection technique which places all of the sample
directly onto the column without vaporization.
fast injection: a patented method of introducing a sample to a heated inlet
without the negative affects of needle fractionation.
If you are using the automatic liquid sampler for the first time, you may not be
aware of the changes you might see in the resulting chromatograms. With
automated fast injection, you obtain chemical performance that is not available
with manual injection. Most of the changes are due to:
• Eliminating the variation inherent in manual injection including the
injection volume, the start time, and the amount of time the syringe needle
is in the heated inlet.
• Reducing the amount of sample that boils out of the needle when injecting
into heated inlets.
To Next Page
Loading...
Need help?
General
