摘要：CODMn of fatty acids is fundamentally important because various materials will produce fatty acids as the results of COD treatment. In acidic method, formic acid consumed oxygen up to 29.3% of theoretical value, but catalytic effect of AgNO8 was not recognized. The other fatty acids indicated a very promoting effect of the addition of AgNO3 to thier oxygen consumption. In alkaline method, formic acid consumed oxygen up to nearly 100%, but lower carbon chain fatty acids, from acetic acid to valeric acid, showed no COD values. COD values of longer carbon chain fatty acids a little increased with an increase in the carbon number. As the reaction products of these acids, fatty acids of reduced carbon number, one after another, were determined with GC and GC-MS. On pivalic acid, tert-C5-acid, an increase in acidic COD value was rather recognized, but the BOD value was much diminished. BOD values of the other fatty acids were considerably high and attention will be necessary when lower COD values of acidic method were estimated. Very lower COD value of alkaline method compared with the BOD values will be better to be avoided.
