The Work reported here was undertaken at the request of CEN to see (1) whether the standard beaker leaching method under discussion at CEN, and based on the German DIN could be made less labour intensive; and (2) whether the leaching parameters could be expressed in more general terms so that alternative procedures could be used. A co-operative experiment was set up in which the amount of leaching of copper and chromium from treated pine sapwood blocks was studied using modifications of the German DIN procedure whilst keeping certain operational parameters constant.

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