Test Procedure. Spray reagent solution evenly over surface of dried
wood. A deept blue color reveals the presence of copper (from the
220.127.116.11.2 Method of Test for Presence of Zinc Naphthenate Preservative.
The materials and equipment required are as
Materials and equipment.
a. Reagents (Stock solutions)
(1) 1 gram of potassium ferricyanide dissolved in 100 ml of distilled
(2) 1 gram of potassium iodide dissolved in 100 ml of distilled water.
(3) Starch indicator solution. Make a paste of 1 gram of soluble
starch in about 5 ml of distilled water, add 100 ml of distilled
water and boil for 1 minute with constant stirring. Cool. Note:
This solution is subject to biodegradation and therefore should not
be used longer than 3 days before a new batch is prepared.
A DeVilbiss No. 30 atomizer or equivalent.
Test procedure: Mix 10 ml each of the three stock solutions and pour into
the atomizer (sprayer). Spray mixture evenly over surface of dried wood.
The solution will cause the treated wood to turn a deep blue instantly
while the untreated part will retain its original color.
4.6 Inspection of preparation for delivery.
4.6.1 Quality conformance inspection of pack.
For the purpose of inspection, a completed pack
Unit of product.
prepared for shipment shall be considered a unit of product.
Sampling for examination shall be in accordance with
Samples selected in accordance with 18.104.22.168 shall be
examined for the following defects. Inspection level shall be S-2 with an AQL
of 4.0 defects per hundred units.
Improper or poor marking
Contents per shipping unit is not correct