MIL-PRF-27402D
APPENDIX A
The elution order of possible sample components is as follows (dimethylamine and methylamine
co-elute):
Air > ammonia > dimethylamine/methylamine > UDMH > water > hydrazine > N-nitrosodimethylamine
(NDMA)
A.2.1.2 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.2.1.3 Calibration. Obtain the normalization factors for each component by observing the
areas produced by a specially prepared mixture, designated the reference standard. Prepare the
standard with freshly distilled components assayed by the gas chromatographic procedure of their
respective specifications; N2H4 MIL-PRF-26536 and UDMH MIL-PRF-25604. The composition of the
mixture should be approximately 51 percent (%) N2H4, 48 % UDMH, and 1% H2O. Weigh each
component to 0.1 milligram (mg). The order of addition in the standard preparation shall be UDMH, N2H4
and H2O. Calculate the actual composition as follows:
����� × ���������
���� % =
����� ����ℎ�
��2�4 × ������2�4
�2�4 % =
����� ����ℎ�
���2� × 100� + ���2�4 × %�2�� + (����� × %�2�)
�2� % =
����� ����ℎ�
where,
��2�4 , �����, ��2�
The weight of each of the components.
=
��2�4 × %�2�
The weight of N2H4 times the percent H2O determined in
=
the assay as per MIL-PRF-26536.
����� × % �2�
The weight of UDMH times the percent H2O determined in
=
the assay as per MIL-PRF-25604.
7
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