MIL-DTL-382E
4.5.3.1.2 Magnesium (eudiometer method) (alternate method). The magnesium shall be
determined in accordance to method 412.1 of Standard MIL-STD-1234.
4.5.3.2 Volatile material at 105oC.
a. Approximately 5 grams of the sample shall be weighed into a tared dish and heated in an
oven for 3 hours at 105oC.
b. Remove the sample from the oven and place into a dessicator at room temperature to
cool.
c. Reweigh sample and the loss in weight shall be calculated as percent volatile material at
105oC.
Percent volatiles =
Where:
A = loss in weight, (gm).
B = weight of sample, (gm).
4.5.3.3 Oil and grease.
a. A weighed portion of approximately 20 grams of the sample shall be extracted with
diethyl ether in a Soxlet or similar extractor for minimum 6 hours using a tared flask.
b. The diethyl ether shall be evaporated by steam bath when extraction is completed in the
flask.
c. The contents shall be dried at 90oC, to constant weight, cooled in a desiccator, and
weighed. A blank shall be run at the same time.
d. The weight of the residue shall be calculated to percent oil and grease, as follows:
Percent oil and grease =
Where:
A = weight of ether extract.
B = weight of blank.
W = weight of sample.
4.5.3.4 Total Fe (ICP method).
4.5.3.4.1 Reagents. Ultra high purity acids shall be used for sample dissolution.
It is advisable to use commercially available stock solutions with certified concentrations
traceable to primary standards (National Institute of Standards and Technology or international
measurement standards). Stock solutions shall be replaced after one year or in accordance with
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