Agilent Technologies 7820A

Agilent 7820 GC Service
137
(19091J-413)
 NPD performance evaluation (checkout) sample
(18789-60060)
 4-mL solvent and waste bottles or equivalent for
autoinjector
 Chromatographic-grade isooctane
 2-mL sample vials or equivalent for sample
Verify the following:
 Capillary column jet installed. If not, select and install a
capillary column jet.
 Capillary column adapter installed. If not, install it.
 Chromatographic-grade gases plumbed and configured:
helium as carrier gas, nitrogen, hydrogen, and air.
 Empty waste vials loaded in sample turret.
 4-mL vial with diffusion cap filled with isooctane and
inserted in Solvent A injector position.
If present, remove any protective caps from the inlet manifold
vents.
Install the evaluation column. (See the procedure for the SS or
PP in the Maintenance manual.)
 Bake out the evaluation column for at least 30 min at
180 °C. (See the procedure for the SS or PP in the
Maintenance manual.)
 Be sure to configure the column.
Create or load a method with these parameter values.
Table 2. NPD Checkout Conditions
Column and sample
Type
HP-5, 30 m — 0.32 mm — 0.25 µm
(19091J-413)
Sample
NPD checkout 18789-60060
Column mode
Constant flow
Column pressure
6.5 mL/min (helium)
Split/splitless
inlet
Temperature
200 °C
Mode
Splitless
Purge flow
60 mL/min