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MIL-P-670A
4.5.3 Copper.
Reagents.
(a)
Sodium diethyldithiocarbamate solution (0.1 percent),
Dissolve 0.5 g ram of sodium diethyldithocarbamate in water and dilute to
Store in an amber bottle.
500 ml.
Dissolve 200 grams
Ammonium citrate solution (40 percent).
of ammonium citrate
in about 400 ml. of water, make just
ammoniacal to litmus paper with ammonium. hydroxide (1 to 1), wash into a
500 ml. separator funnel, add 5 ml. oc diethyldithiocarbamate solution,
Drain off and discard
and shake with 25 ml. of chloroform for 1 minute,
the chloroform layer, and dilute to 500 ml. with water.
EDTA (disodium dihydrogen ethylenedinitrolotetraacetate)
Dissolve 10 grams of EDTA in water and dilute to 200 ml.
(5 percent).
Standard copper solution (1 ml. = 0.01 mg. of (Cu). Dissolve
0.1964 gram of copper sulfate
in water, add 5 ml. Of
Pipet
hydrochloric acid, and dilute to 1 liter in a volumetric flask.
50 ml. into a 250 ml. volumetric flask and dilute to the mark.
10

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