Standard Test Methods for Fatty and Rosin Acids in Tall Oil Fractionation Products by Capillary Gas Chromatography
|Publication Date:||1 July 2015|
|ICS Code (Fruits and derived products):||67.080.10|
|ICS Code (Animal and vegetable fats and oils):||67.200.10|
These test methods cover the determination of the amounts of the individual fatty acids and rosin acids in fractionated tall oil products, using capillary gas chromatographic separation of the volatile methyl esters of these acids.
Four methods for forming the methyl esters, and two methods for determining the amounts of the individual fatty acids and rosin acids are described.
The classic method for the formation of methyl esters is through
the use of diazomethane, but diazomethane is a hazardous and toxic
material, and so is no longer the preferred reagent. The use of
diazomethane is detailed in the Appendix. Methyl esters may be
formed through the use of tetramethylammonium hydroxide (TMAH),
The two methods for determining the amount of the individual fatty acids and rosin acids are the "internal standard" method, which yields absolute values, and the "area percent" method, which yields relative values.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.