890
ANALYTICAL
If larger samples or more rapid gas flow rates are utilized, the absorption path of the absorber must be lengthened correspondingly. This admonition is exemplified by cyclonite analyses which were carried out using tube NA-3 and a gas flow rate of 8 cc. per minute. This causes an increase in the relative error of the carbon value to about 2% or about three times the average of the errors listed in Table 111. ACKNOWLEDGMENT
The authors are grateful for a grant-in-aid from the Scientific Research Committee of the University of Toronto, and to D. C. Sievers, Tennessee Eastman Co., for his help in checking the analytical procedure in his laboratories.
(7) Elving, P. J., and AZcElroy, W. R., IND.EXG.CHEM.,ANAL.ED., 13,660 (1941). (8) Friedrich, A, “Die Praxis der Quantitativen Organischen Mikroanalyse,” Leipsig and Vienna, Franz Deuticke, 1933. (9) Friedrich, A , , Mikrochemie, 10,329 (1932). (10) Ibid., 19,23 (1935). (11) Hoffmann,R. A.1 and Kohlschutter, V., Ann., 3079 314 (1899). (12) Irimescu, I., and Popescu, B., 2. anal. Chem., 128, 185 (1948). (13) Kaine, G., Mikrochemie per. Mikrochzm. Acta, 39, 166 (1952). (14) Kirner. W.R.. ISD.ESG.CHEM..A N A L .ED.. 7. 366 (1938). il5; Ibid.. 10., 342 (1938). ~ ,
