Other Parameters - Agilent Technologies 7697A Advanced Operation Manual

3
Method Development

Other parameters

42
To set the purge flow:
Press [Adv Function].
1
Select Purge flow and enter the desired flow rate, in
2
mL/min.
Select Purge time and enter the purge time.
3
If experiencing carryover, try increasing the purge flow or
purge time to sweep any residual sample vapors from the
system.
Note that typically, the HS purges the sample probe
(including sample loop) and vent for the first half of the
purge time, then closes the vent valve to purge just the
sample probe (and sample loop). If the purge time is 0.1 to
0.2 minutes, the first 0.1 minutes purges the vent and
sample probe, and the remaining time purges only the probe.
If the purge time is less than 0.1 minutes, then the HS
purges both the sample probe and vent for the entire time.
In addition to the parameters described above, the remaining
headspace sampler method parameters can be found using
the [Adv Function] key. These functions will be discussed in
detail in the following sections:
Extraction mode
Sequence Actions
Using parameter increment
The Barcode Reader
Advanced Operation