MIL-PRF-87930B
APPENDIX B
B.2.2.3 Reagents and equipment. The following shall apply as test conditions of B.2.2:
B.2.2.3.1 Reagents.
a. Purified water of 18M-ohm or greater resistivity.
b. Ferric alum indicator, Volhard (oxidation reduction indicator) Dissolve 10 g of ferric
ammonium sulfate dodecahydrate (FeNH4(SO4)2·12H2O) ACS reagent grade in approximately 50 mL of
purified water. Add 10 mL of ACS reagent grade nitric acid and dilute to 100 mL with purified water. (may
be commercially obtained).
c. Mercuric thiocyanate, 4.17 g/L in methanol for chloride determination (commercially available).
d. Chloride standard, 1000 mg/L (may be commercially obtained; must be certified).
B.2.2.3.2 Equipment. UV-Vis Spectrophotometer, double beam, equipped with 5 cm cells.
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