Biological Significance of ODPN-Insoluble and Glycol-Insoluble Tests

The results of bioassay tests indicate that a quick method for determination of the relative initial preservative potential of creosote and creosote-petroleum mixtures may be available to the wood-preserving industry. ODPN-insoluble test values are related to the expected unweathered block thresholds that might be obtained by soil-block bioassay. The same relationship holds for glycol-insoluble values. A glycol-insoluble index of 53 or less corresponds generally to a satisfactory whole creosote. The petroleum with glycol-insoluble indices higher than 86 will have high thresholds usually, indicating unsatisfactory preservative performance. A creosote or a blend of questionable preservative potential would fall into a transitional zone of 54 to 85. This is an intermediate threshold position and suggests questionable field performance.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member