Abstract
White spruce (Picea glauca) was treated with ammoniacal solutions of various preservatives containing copper, zinc, and arsenic. The wood was then leached in a severe accelerated test and the amount of copper, zinc, and arsenic lost from the wood was determined. The leachability of arsenic depended on the preservative formulation; when the ratio of metal oxide to arsenic oxide was less than 1.25, 35 to 67% of the arsenic was lost, but when this ratio was greater than 1.25 only 1 to 15% of the arsenic was lost. Only small amounts (1 to 4%) of copper and zinc were leached out using any of the tested formulations. Temperature of fixation had only a slight influence on leaching of copper, zinc or arsenic.
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