ASTM-D5974 Standard Test Methods for Fatty and Rosin Acids in Tall Oil Fractionation Products by Capillary Gas Chromatography

ASTM-D5974 - 2015 EDITION - CURRENT
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Standard Test Methods for Fatty and Rosin Acids in Tall Oil Fractionation Products by Capillary Gas Chromatography
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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.

Keywords

area percent; derivatization; fatty acids; gas chromatography; internal standard; rosin acids;; ICS Number Code 67.080.10 (Fruits and derived products); 67.200.10 (Animal and vegetable fats and oils)

To find similar documents by ASTM Volume:

06.03 (Paint -- Pigments, Drying Oils, Polymers, Resins, Naval Stores, Cellulosic Esters, and Ink Vehicles)

To find similar documents by classification:

67.080.10 (Fruits and derived products Including nuts)

67.200.10 (Animal and vegetable fats and oils Butter, see 67.100.20)

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Document Number

ASTM-D5974-15

Revision Level

2015 EDITION

Status

Current

Modification Type

Revision

Publication Date

Aug. 15, 2015

Document Type

Test Method

Page Count

6 pages

Committee Number

D01.34