196 



JOSEPH L. McCarthy 



Rayonier, Inc., Shelton, Washington; Dr. B. F. Hrutfiord, 

 Pulp Mills Research Program, University of Washington, 

 Seattle; Mr . A , Livingston, Washington State Pollution 

 Coramission, Olympia; Mr, G. L. Toombs, Oregon Sanitary 

 Authority, Portland; M. Waldichuk, Fisheries Research 

 Board of Canada, Naniaroo, British Columbia; Mv . Ron 

 Westley, Washington State Department of Fisheries, Quilcene. 



These gentlemen were the co-authors of this 

 paper on standarized procedure. It was this procedure to 

 which reference was made in our third conclusion: 



"3. Careful study of the several available 

 analytical procedures, and consideration and experimental 

 investigation of alternative possibilities by the authors 

 and by collaborating scientists, led to the selection of 

 what is hoped to be a generally acceptable standardized 

 method." 



This standarized Pearl-Benson method was 

 estimated by us to give a precision of the order of .5 to .5 

 parts per million of apparent spent sulfite liquor on a 

 10 percent solids basis when carried out in a particular 

 laboratory. However, when the procedure was applied to a 

 number of water samples in several different laboratories 

 to permit estimation of reproducibility under these 

 conditions, the conclusion was as follows: 



