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|  MIL-C-70501 (AR)
a 0.2 titanous chloride solution (MIL-STD-286, Method 601.1.1).
Perform a blank titration on the reagents. Calculate percent
NC as follows:
Percent (%) NC =
Where:
Volume titanous chloride used for sample, ml.
V
=
B
=
Volume titanous chloride used for blank, ml.
=
Weight of dried sample, gm.
W
=
Normality of titanous chloride
N
E
=
Percent nitrogen in the nitrocellulose
4.5.1.3.4
Acrylic
Reagents
SULFURIC ACID - 93 -
POTASSIUM SULFATE OR ANHYDROUS SODIUM SULFATE - Reagent Grade,
THIOSULFATE SOLUTION -
SODIUM HYDROXIDE -
diluted to one liter
METHYL RED INDICATOR - 1 g methyl red dissolved in 200 ml ethyl
alcohol
METHYLENE BLUE INDICATOR - 1 g methylene blue dissolved in 200
ml ethyl alcohol
HYDROCHLORIC OR SULFURIC ACID STANDARD SOLUTION - 0.1N
BORIC ACID SOLUTION -
HENGAR GRANULES
Apparatus
DIGESTION - Use Kjeldahl flasks of hard, moderately thick
well-annealed glass with total capacity of 500 to 800 ml.
17
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