MIL-DTL-45444C
Table V.
Composition of HMX/RDX Standards
HMX
RDX
Percent
Weight, grams
Percent
Weight, grams
99.5
0.4975
0.5
0.0025
98.0
0.4900
2.0
0.0100
96.5
0.4825
3.5
0.0175
Each calibration standard which is prepared shall be tested using
the conditions and methodology outlined in Sections 4.7.1.6.1 and
4.7.1.6.2.
4.7.1.6.4 Preparation and analysis of HMX samples. Dry
approxio ately 1 gram of the HMX sample to be tested in an oven at
m
100 + 5 C for a minimum of one hour. Using an analytical
balance, weigh approximately 0.05 gram of the dried HMX to the
nearest 0.1 milligram in a clean, glass 30-ml bottle with a
Teflon lined lid. Add 25.0 milliliters of HPLC grade acetone to
the bottle using an automatic repipette. Cap the bottle and
place the samples in an ultrasonic bath for 10 minutes or until
the HMX is completely dissolved and the solution is uniformly
mixed.
The HMX samples which are prepared shall be tested using the
conditions and methodology outlined in 4.7.1.6.1 and 4.7.1.6.2.
Use the chromatographic peak areas for HMX and RDX in the sample
to determine the HMX purity and the RDX content using the
following calculations:
Percent (HMX) = 100 x A x B
CxW
Where:
A = The HMX chromatographic peak area (or height) obtained
for the HMX sample.
B = The weight of HMX in the calibration standard in
grams. (Use the calibration standard which provided a
peak area closest to the area obtained for the sample.)
C = The HMX peak area obtained for the calibration standard
having the weight, B. above.
W = The total weight of the HMX sample in grams.
Percent (RDX) = 100 x E x F
GxW
Where:
E = The RDX chromatographic peak area (or height) obtained
for the RDX in the HMX sample.
F = The weight of RDX in the calibration standard in grams.
(Use the calibration standard which provided a peak area
closest to the area obtained for the sample.)
G = The RDX peak area obtained for the calibration standard
having the weight, F. above.
W = The total weight of the HMX sample in grams.
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