MIL-DTL-98B
the volumetric bromide-bromate method as follows. Measure accurately 25 ml. of 0.10N
bromide-bromate solution with a pipette into a glass-stoppered Erlenmeyer flask containing the
above filtrate and cool the contents to 15 degrees C. Add 5 ml. of concentrated hydrochloric
acid and follow with the addition of 10 ml. of 10 percent potassium iodide solution after one
minute. Titrate the contents with 0.10N sodium thiosulfate solution, using starch as indicator.
Make blank determination on 25 ml. of 0.10N bromide-bromate solution exactly as above and
calculate the aniline from the difference obtained by subtracting the number of ml. of thiosulfate
solution used in titrating the sample from that used in titrating the blank. (A correction must be
made for the amount of diphenylamine dissolved in 100 ml. of water at 25 degrees C. and also is
shown in the formula as 0.33 ml. 0.1 normal sodium thiosulfate solution.)
Calculation:
N V - v 0.0331.551
Percent aniline =
W
Where:
V= ml. sodium thiosulfate used in blank
v= ml. sodium thiosulfate used in titration
N= Normality of sodium thiosulfate
W= Weight of sample in grams
4.2.7 Workmanship. The compliance of workmanship shall be determined by visual
examination.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed by
DOD or in-house personnel, these personnel need to contact the responsible packaging activity to
ascertain packaging requirements. Packaging requirements are maintained by the Inventory
Control Point s packaging activities within the Military Service or Defense Agency, or within the
military service s system commands. Packaging data retrieval is available from the managing
Military Department s or Defense Agency s automated packaging files, CD-ROM products, or
by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful,
but it not mandatory.)
6.1 Intended use. The intended use for the diphenylamine in this specification is as a
stabilizer in the production of smokeless propellants.
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