ASTM-D5974 2005

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D5974-00(2005) Standard Test Methods for Fatty and Rosin Acids in Tall Oil Fractionation Products by Capillary Gas Chromatography

Published By	Publication Date	Number of Pages
ASTM	2005	6

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Categories: 67.080.10 - Fruits and derived products, 67.200.10 - Animal and vegetable fats and oils, ASTM

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Description

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.

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PDF Pages	PDF Title
1	Scope Referenced Documents Significance and Use
2	Conversion By Means of Tetramethylammonium Hydroxide (TMAH) Conversion By Means of Trimethylphenylammonium Hydroxide (TMPAH) Conversion by Means of N,N-Dimethylformamide Dimethyl Acetal (DMF-DMA) Apparatus
3	Reagents and Materials Procedure Set-up of Gas Chromatograph (GC) FIG. 1
4	Analysis Calculation Report Precision and Bias —Same as apparatus described in Section . Reagents and Materials Procedure Set-up of Gas Chromatograph Analysis Calculation TABLE 1
5	Report Precision and Bias Keywords X1. CONVERSION BY MEANS OF DIAZOMETHANE X1.1 Apparatus X1.2 Reagents and Materials X1.3 Procedure TABLE 2
6	FIG. X1.1

Additional information

Standard Title	D5974-00(2005) Standard Test Methods for Fatty and Rosin Acids in Tall Oil Fractionation Products by Capillary Gas Chromatography
Published Code	ASTM
Publication Date	2005
Pages Count	6
ICS Codes	67.080.10 - Fruits and derived products 67.200.10 - Animal and vegetable fats and oils

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ASTM-D5974 2005

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