MIL-DTL-45449C
4.6.1.1 Primary method.
4.6.1.1.1 Materials and equipment. The materials and equipment required as follows:
a. PQ check (indicator): The formulation contains 10 parts by weight of sodium
diethyldithicarbamate trihydrate and 90 parts by weight of distilled water. (see 6.14)
b. Dropper: An ordinary glass tube eye dropper may be used.
4.6.1.1.2 Test procedure. Two drops of PQ Check (indicator) shall be applied to the wood
surface. An immediate dark brown coloration and the spreading of the drops shall indicate PQ56
treatment.
4.6.1.2 Alternate method.
4.6.1.2.1 Materials and equipment. The material and equipment required are as follows:
a. Reagent. Dissolve 0.5 grams chrome azurol S concentrate and 5.0 grams sodium
acetate in 80 ml of distilled water and then dilute further to 500 ml total with distilled water. (see
6.14)
b. Sprayer. A common manual (fly) sprayer type applicator should be used.
4.6.1.2.2 Test Procedure. Spray solution evenly over surface of dried wood. A deep blue
color reveals the presence of copper (from the coper-8-quinolinolates).
4.6.2 Presence of M-Gard W550 (zinc naphthenate emulsifiable). Time of immersion
shall be observed when treated with M-GARD W550, the pallet shall show evidence of
discoloration. (See 6.14)
4.6.2.1 Materials and equipment. The materials and equipment required are as follows:
a. Reagent. Dissolve 0.1 grams of dithizone (diphenylthiocarbazone) (see 6.14)
In either 100 ml of methyl ethyl ketone or 100 ml of chloroform (Note: This solution may be
stored for long periods of time).
b. Eye dropper. An ordinary glass tube eye dropper may be used.
4.6.2.2 Test procedure. Five drops of the solution shall be applied to the wood surface,
the indicator will turn red when zinc (M-GARD W550) is present. The color green indicates that
the preservative is not present. Both colors fade quickly in the presence of light.
4.6.2.3 Alternate method.
4.6.2.3.1 Materials and equipment. The materials and equipment required are as
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