Agilent Technologies Varian CP-8400 Operator's Manual page 53

Internal Standard
following parameters:
Use Internal Standard? (Yes or No) – This parameter determines
whether the system will use an Internal Standard as part of the sampling
procedure. Selecting Yes will cause the CP-8400/8410 to draw up the
specified amount of Internal Standard from the specified vial. Selecting
No will cause the AutoSampler/AutoInjector to not use an Internal
Standard. The Internal Standard will always be withdrawn before the
sample is withdrawn to avoid as much as possible cross contamination of
the Internal Standard with analytes. The default value is No.
Internal Standard Vial (I, II, III) – This parameter will identify which of
the three Clean vials contains the Internal Standard. The AutoSampler/
AutoInjector will draw up the Internal Standard before the sample. This
order is to minimize contamination of the Internal standard by residual
sample. The default Internal standard vial is Clean Vial position II.
Internal Standard Size (0-4.9, 0-9.0 µL or 0-90 µL) – This parameter
defines the volume of Internal Standard that will be extracted for
injection. The AutoSampler/AutoInjector will draw up the Internal
Standard before the sample. The default Internal Standard volume is 1
µL.
Internal Standard Drawup Speed (0.1-25, 0.1-50, or 1-100 µL/sec) –
This parameter defines how fast the plunger will be drawn out of the
syringe extracting Internal Standard from the vial and into the syringe.
The default value is 5 µL/sec.
Internal Standard Pause Time (0-9.9 sec) – This parameter defines
how long the syringe will remain in the vial after the plunger has reached
its set withdrawal volume. This is required to allow the Internal standard
to fully migrate into the syringe. The default value is 0 sec.
Internal Standard Air Gap (Yes or No) – Selecting Yes for this
parameter will cause the AutoSampler to withdraw the plunger a distance
equal to 1 µL after the syringe has been withdrawn from the vial.
Selecting No will cause the syringe plunger to remain in its position
subsequent to the extraction of the Internal Standard until some other
sampling action is required. No air gap will be withdrawn. The default
value is Yes.
Default Clean
following parameters. Use in case Automation is stopped or a serious
fault is detected.
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