Coke Residue Test for Creosote Oils

Abstract

the past year the authors' attention was called to rather marked discrepancies in the results of this test,2 not only in different laboratories but with the same operator when testing oils especially prepared and distributed for comparative work.The possible variations in the test were first shown by experiments on two samples of oils distributed to four laboratories with instructions to follow the method outlined. The results of these experiments are given in Table I.