ASTM D5974-96
Historical Standard: ASTM D5974-96 Standard Test Methods for Fatty and Rosin Acids in Tall Oil Fractionation Products by Capillary Gas Chromatography
SUPERSEDED (see Active link, below)
ASTM D5974
1. Scope
1.1 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.
1.2 Four methods for forming the methyl esters, and two methods for determining the amounts of the individual fatty acids and rosin acids are described.
1.2.1 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), trimethylphenylammonium hydroxide (TMPAH), or N,N-dimethylformamide dimethyl acetal (DMF-DMA).
1.2.2 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.
1.3 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D509 Test Methods of Sampling and Grading Rosin
D804 Terminology Relating to Naval Stores, Including Tall Oil and Related Products
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
area percent; derivatization; fatty acids; gas chromatography; internal standard; rosin acids; Capillary gas chromatography; Area percent; Derivatization; Fatty acids--tests; Fractionation products; Gas chromatography (GC)--paints/related coatings/materials; Rosin acids content ;
ICS Code
ICS Number Code 67.080.10 (Fruits and derived products); 67.200.10 (Animal and vegetable fats and oils)
DOI: 10.1520/D5974-96
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