ASTM D5768-95
Historical Standard: ASTM D5768-95 Standard Test Method for Determination of Iodine Value of Tall Oil Fatty Acids
SUPERSEDED (see Active link, below)
ASTM D5768
1. Scope
1.1 This test method covers the Wijs procedure for determination of unsaturation (iodine value) of tall oil fatty acids.
1.2 Iodine value is a measure of the unsaturation of oils and fatty acids and is expressed in terms of the number of centigrams of iodine per gram of sample (weight percent of absorbed iodine).
1.3 When this test method is used to determine the iodine value of fatty acids having conjugated systems, the result is not a measure of total unsaturated, but rather is an empirical value that affords a comparison of unsaturation. Total unsaturation of conjugated systems may be measured in accordance with Test Method D1541.
1.4 The test method described here is not reliable for tall oil fatty acids containing an appreciable quantity of rosin.
1.5 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
D1193 Specification for Reagent Water
D1541 Test Method for Total Iodine Value of Drying Oils and Their Derivatives
D1959 Test Method for Iodine Value of Drying Oils and Fatty Acids
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
Keywords
iodine value; tall oil fatty acids; Unsaturation; WIJS procedure (iodine value); Fatty acids--tests; Iodine value; Tall oil fatty acids ;
ICS Code
ICS Number Code 87.060.20 (Binders)
DOI: 10.1520/D5768-95
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