MIL-DTL-20354D (AR)
consecutive lots have again successfully passed the
requirements contained therein, the provisions of 4.4.1.3.2
shall be reinstated.
4.4.1.3 Refiring. If for any reason the test director
considers that the test conditions have detrimentally
affected the test results, the test shall be considered
invalid and a new test shall be performed with additional
rounds as required.
4.4.2 Moisture content.
4.4.2.1 First fire composition. The moisture content of the
first fire composition shall be determined in accordance
with Standard MIL-STD-1234, Method 101.3. The special
solvent to be used shall be equal parts by volume of
dimethylformamide and anhydrous methanol.
4.4.2.1.1 First fire composition sampling plan. The
contractor shall provide adequate controls to insure
compliance with the requirements and shall select a three to
four ounce first fire composition sample from each eight
hours of production and place it in an airtight labeled
container indicating the name of the material and date of
production. If the sample, after analysis, fails to comply
with the applicable requirement; the eight hours of
production represented by the sample shall be rejected.
4.4.2.2 Illuminant composition. The moisture content of the
illuminant composition shall be determined in accordance
with the Karl Fischer Method as stated in Standard MIL-STD-
1234, Method 101.2 up to paragraph 5.3.0. A 50 ml. sample of
1.1 ml dimethylformamidemethyl alcohol solution shall be
added into a 250 ml. Erlenmeyer flash (fitted with a rubber
stopper) containing 10 grams of the pyrotechnic sample
(exercise care to exclude atmospheric moisture). The flask
shall be stoppered and shaken vigorously to thoroughly mix
solution and pyrotechnic sample. Allow the solution to set 5
15 minutes. A blank sample of the 1: l dimethylformamide-
methanol solution shall be prepared as described above. A 60
ml. portion of methanol shall be transferred through the
sample porthole into dry titration beaker containing a
plastic coated magnet. Stopper at once. The magnetic stirrer
shall be started and the water back-titrated in this solvent
by adding a slight excess of Karl for at least half a
minute. The solution shall be titrated slowly with the
water-in-methanol solution until the exact preliminary and
point is reached. All succeeding operations shall be
completed within 3.5-0.25 minutes. Twenty-five (25) ml. of
supernatant solution shall be rapidly introduced, accurately
pipetted from the supernatant liquid into the beaker stirred
for thirty seconds by means of the magnetic stirrer. A
slight excess (10-15 m l s) of the Karl Fischer reagent
shall be added and carefully back-titrated with the standard
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