MIL-PRF-27402D
APPENDIX A
HYDRAZINE - UDMH ASSAY AND WATER
A.1 SCOPE
A.1.1 Scope. This Appendix describes a Gas Chromatographic method for the determination of
hydrazine, UDMH and water content in the sample. This Appendix is a mandatory part of the
specification. The information contained herein is intended for compliance.
A.2 METHOD
A.2.1 Gas chromatographic method.
A.2.1.1 Procedure. A 60 meter (m) x 0.53 mm, 1.00 µm film thickness Agilent DB-Wax capillary
column, a Thermal Conductivity Detector (TCD), with a split injector and a glass wool packed split liner
shall be used. Table A-1 provides a summary of the critical operating parameters. These parameters
may vary depending on GC system, detector brands, and column length and may be adjusted to optimize
component resolution.
TABLE A-1. GC and method parameters
PARAMETER
CONDITION
Injector Port Temp.
150 °C
Injection Mode
Split injection
Sample Volume
1 µL
Split Ratio
1:50
Carrier Gas
He
Control Flow
10 mL/min
Control Mode
Flow
TCD Detector Temp.
210 °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.2.1.2.
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