MIL-DTL-11309J
4.5.1.2.6 Calculation. Calculate the result as follows:
Normality of sodium lauryl sulfate (N SLS) = (weight of SLS)(percent purity)
(100)(288.4)
Where:
N hyamine = 20 X (N SLS)
mL hyamine
4.5.1.2.7 Labeling. Label the container with the normality, date, and technician's initials.
4.5.1.2.8 Caution. Hyamine normality is affected by contact with certain types of plastic
tubing. Therefore, it may be necessary to flush the tubing if solution has been standing two days
or more.
4.5.1.2.9 Preparation of methylene blue indicator. Prepare a dye solution containing
3.0 grams of pure methylene blue per liter. The amount of dye depends on the percent dye stated
on the container label and is calculated as follows:
Grams of dye = 3.00 X percent dye content
100
Wash the dye into a one-liter volumetric flask and dilute to volume with distilled water. Mix
well before each use. To prepare the methyl blue indicator, fill the container to be used half full
with distilled water. Then for each liter of solution add 10 mL of methylene blue concentrate,
8 mL of concentrated sulfuric acid, and 50 grams of sodium sulfate. Mix well and dilute to
volume. Mix well again. Label properly.
4.5.1.3 Moisture. Weigh sample of 3 grams of the LAS surface active material to the
nearest 0.1 mg in a covered sample dish. Uncover the dish and dry the sample in an oven for
24 hours at 105 șC ± 2 șC. Replace the cover, cool the sample to room temperature in a
desiccator, and again weigh the sample to the nearest 0.1 mg.
4.5.1.3.1 Calculation. Calculate the result as follows:
Percent moisture = (loss of weight)(100)
(grams of sample)
4.5.2 Tests on contents of pouch A.
4.5.2.1 Titratable chlorine. Thoroughly and quickly mix approximately 5 grams of the
contents of the pouch A sampled at random by shaking in a closed glass container. Promptly
obtain a representative sample of 1 gram from the 5 gram sample, weighed to the nearest
milligram, and place in a 500-mL Erlenmeyer flask. To this, add 2 grams of potassium iodide
(KI) crystals and approximately 25 mL of glacial acetic acid. Stopper the flask and swirl for
about 5 minutes to dissolve the sample. (Note: Carry out determination of titratable chlorine in
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