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| MIL-W-215D
(b) Tank cars or tank trucks. The four individual specimens taken as specified
in 4.2.2.2(b) shall be separately tested as specified in 4.2.4. Failure of any test by any
specimen shall be cause for rejection of the lot represented.
4.2.4 Tests. Unless otherwise specified below, all specimens shall be transferred in
the following manner:
(a) Melt the phosphorus in its container using a water bath. Do not heat above
50C.
(b) Immerse the tip of a Mohr pipet in the water layer, flush several times, and
draw approximately 1 inch of water into the pipet.
(c) Place the tip of the pipet in the WP layer, stir to bring any sediment into
suspension, and draw the required volume.
(d) Return the tip of the pipet to the water layer and shake out a few drops of
WP, replacing them with water.
(e) Withdraw the pipet and place the specimen in the appropriate water-filled
glassware.
Reagent grade chemicals shall be used throughout the tests. Where applicable, blank
determinations shall be run and corrections applied where significant. Tests shall be con-
ducted as follows:
4.2.4.1 Appearance. Visually examine the specimen for form, luster, and black par-
ticulate matter.
4.2.4.2. Color. Run hot water on the specimen until it becomes a liquid (about 140F).
Determine the color in accordance with ASTM D 1500.
4.2.4.3 Melting point. Cool a thermometer having a 0 to 50C range and cal-
ibrated in 0.1C divisions by inserting the bulb in cold water until the temperature is
approximately 10C. Insert the bulb of the thermometer into the tube containing the
specimen used in the color determination in 4.2.4.2 (Caution. Make sure that the water
and specimen have cooled enough so that the specimen will solidify on the thermometer
bulb.) Immediately insert the bulb with cooled specimen on it into a 300-milliliter (mL)
tall form beaker containing approximately 200 mL of water having a temperature of 90
to 100F. Swirl the beaker while slowly adding water having a temperature of 160 to
170F until the specimen begins to melt from the bulb. Immediately read the thermome-
ter and record this reading as the melting point of the specimen.
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