Technical Bulletin No. 0182: Colorimetric Measurement of Resin Acid Soaps in Pulp and Paper Mill Wastes

One group of constituents present in kraft pulp mill effluents which has long been known to be potentially toxic to aquatic life are the resin acids and their salts. Methods for the detection and analysis of waste waters for these materials have left something to be desired since they have been involved and, under some conditions, questionable in accuracy. The attached National Council Technical Bulletin describes a more satisfactory method developed by William L. Carpenter, at the South Central Middle' Atlantic Research Center, at Johns Hopkins University. This method can be run with sufficient ease to allow its use as a routine procedure in circumstances where this procedure appears desirable.