Performance Verification
7
SCD and NCD User Manual
115
However, a new burner (or a burner with a new quartz tube)
can have a very high baseline after first ignition. In this case,
the baseline should gradually decrease, depending on burner
cleanliness. Noise will also greatly decrease over time. For a
well-stabilized system, noise measured by Agilent OpenLAB
CDS should be approximately 4 display units or less.
Checkout can continue before the baseline becomes
completely stable.
6
Create or load a method with the parameter values listed in
Table 15
NCD Checkout conditions
Column and sample
Type
HP-5, 30 m × 0.32 mm × 0.25 µm
(19091J-413)
Sample
NCD checkout 5190-7002
Column flow
2.2 mL/min
Column mode
Constant flow
Split/splitless inlet
Temperature
250 °C
Mode
Splitless
Purge flow
80 mL/min
Purge time
0.8 min
Septum purge
3 mL/min
Gas saver
Off
Multimode inlet
Mode
Splitless
Inlet temperature
250 °C
Initial time
0 min
Purge time
0.8 min
Purge flow
80 mL/min
Septum purge
3 mL/min
Gas saver
Off
Cool on-column inlet
Temperature
Oven Track