April 15, 1943
26 1
ANALYTICAL EDITION
independent analyses b y the acetin method. Samples 10 and 11 are “synthetic soap lyes”, made from weighed amounts of the standard A. 0. C. S. crude glycerin, salt, and water, t o simulate the average soap lyes found in practice.
t h a t the author would like, he feels t h a t i t is essentially useful as it stands and t h a t refinements may be added when i t is generally tried out.
Summary
Literature Cited
This method offers many advantages. The over-all time is about 4 hours, and the applied time is less than 1 hour. The technique is simple and t h e apparatus is readily available. The deviation from accepted or independent analyses of crudes is less than 5 parts per thousand, a fact that recommends it as a cost-accounting tool. Although the method has not been perfected t o the degree
(1) Am. Oil Chem. Soc., “Official and Tentative hlethods”, p. D-5 (1941). (2) Andrews, J. T. R., et al., Oil & Soap, 18, 14 (1941). (3) Committee on Fats, Soaps, and Glycerine, Division of Industrial Chemists and Chemical Engineers, AM. CHEM.SOC.,J. IND. ENC.CHEX,3, 682 (1911). (4) Govan, W.J., Jr., Oil & Soap, 19,27 (1942). (5) Lawrie, J. W., “Glycerol and the Glycols”, pp. 234-5, New York, Chemical Catalog Co., 1928.
Determination of Tin in Babbitts, White Metal Alloys, and Bronze EDWARD T. SAXER AND ROBERT E. MINTO, Otis Works, Jones and Laughlin Steel Corp., Cleveland, Ohio
WHILE
seeking a more satisfactory method for the determination of small amounts (
