MIL-PRF-27404D
APPENDIX A
TABLE A-1. GC Recommended parameters
PARAMETER
CONDITION
Carrier Gas
He
Carrier Flow
10 mL/min
Sample Volume.
1 µL (10:1 split)
Inlet Temp.
150 °C
TCD Detector Temp.
200 °C
Carrier + Aux. Flow
~25 mL/min
Carrier + Aux. + Ref. Flow
~65 mL/min
Total (Splitter Bypass) Flow
~90 mL/min
Purge
On
Oven Max
200 °C
Equilibration Time
2.00 min
Initial Temp.(T0)
60 °C
Initial Time (t0)
3.00 min
Rate (1)
10 °C/min
Final Temp. (Tf1)
100 °C
Final Time (tf1)
0.00 min
Rate (2)
20 °C/min
Final Temp. (Tf2)
185 °C
Final Time (tf2)
3.75 min
Allow the instrument to stabilize, condition the column and perform check runs by processing
three consecutive injections of 1 - 2 µL of sample. The checks must meet the quality control criteria in
A.2.2.2.
A.2.2.2 Quality control. The following performance criteria must be met for fuel purity analysis,
RSD ≤ 10 %
a
GC replicate analyses (3 consecutive)
a. RSD = Standard Deviation * 100% / Mean
A.2.2.3 Equipment.
(1) Gas chromatograph equipped with a thermal conductivity detector (TCD) and a
split/splitless injector.
(2) Agilent ChemStation or equivalent.
(3) A 30 m x 0.53 mm x 1 µm Stabilwax DB capillary column.
(4) Glass wool packed split liner
8
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