MIL-DTL-87107E
APPENDIX A
A.6.2 Acceptance sample. Dilute an aliquot of the JP-10 acceptance sample at least 1:10
(preferably 1:20) with pentane, hexane, or petroleum ether. Mix thoroughly and inject a measured
volume into the chromatograph, simultaneously activating the temperature program, the integrator, and
the recorder.
A.6.3 Integration. Integrate the area under the chromatogram continuously until the final peak
has been eluted. C-10 extra peaks which are within plus or minus ten percent of the retention time for
C-10 shall be considered part of the C-10 peak if they do not contribute more than 20 percent to the total
C-10 peak areas. A typical GC/MS chromatogram is included as Figure A2.
A.7
CALCULATIONS
A.7.1 Weight percent. For each JP-10 acceptance sample, calculate the weight percent of C-10 as
follows:
A C -10
% C - 10 =
× 100
A C-10 + A impurties
In the above equation, all hydrocarbons other than those contained in the C-10 subgroup are considered
impurities. A response factor of 1.000 is used for the impurities.
A.8
PRECISION
A.8.1 Studies. Detailed precision studies have not been performed for this method. However,
limited results indicate that the method is capable of the following precision.
A.8.1.1 Repeatability. Replicate analyses, performed under identical conditions in the same
laboratory, should yield results that do not vary more than 1 percent (absolute) from the mean value for
each component.
A.8.1.2 Reproducibility. When the same sample is analyzed in different laboratories according
to this method, the results for any component should not differ by more than 1.5 percent (absolute).
A.8.1.3 Accuracy. Back-analysis of a calibration standard should give results that agree with the
known values to within 0.5 percent (absolute).
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