ASTM D1585-15(R2020) pdf free download

ASTM D1585-15(R2020) pdf free download.Standard Test Methods for Fatty Acids Content of Pine Chemicals, Including Rosin, Tall Oil, and Related Products
1. Scope
1.1 These test methods cover the determination of the fatty acids of pine chemicals, including rosin, tall oil, and related products. 1.2 These test methods may not be applicable to adducts or derivatives of rosin or other pine chemical products. 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Summary of Test Method
3.1 The rosin acids content is determined using either the modified potentiometric Wolfe Method or the modified indica- tor Wolfe Method described in Test Methods D1240. Rosin acids are calculated as abietic acid. 3.2 The acid number is determined by either the potentio- metric or the indicator method in accordance with Test Meth- ods D465. 3.3 The unsaponifiable matter is determined in accordance with the methods described in Test Method D1065. 3.4 The fatty acids are calculated by two methods. 3.4.1 For materials with a fatty acid content less than 5 %, fatty acid content is calculated from the rosin acids content and the acid number. 3.4.2 For materials with a fatty acid content greater than 5 %, fatty acid content is calculated from the rosin acids and unsaponifiables content. 3.5 The same method for end point detection, either poten- tiometric or indicator, should be used for acid number, unsaponifiables, and rosin acids content determination, in order to avoid slight variables that might occur. 3.6 Since the fatty acids remaining in tall oil rosin, tall oil, and other pine chemical products consist of oleic acid with varying amounts ofother saturated and unsaturated acids, it has become customary to calculate and report the fatty acid content as oleic acid.
4. Significance and Use
4.1 These test methods are designed to broaden the scope of the previous edition of these test methods by the inclusion of tall oil as a test material. Test Methods D803 currently includes methods for the determination of the rosin acid and fatty acid content of crude tall oil. Test Methods D803 references Test Method D1585. 4.2 Rosin and tall oil are composed primarily of rosin acids and fatty acids, and the measurement of these components is important in establishing the composition of these materials.
5. Purity of Reagents
5.1 Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where such specifications are available. 3 Other grades may be used, pro- vided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. 5.2 Unless otherwise indicated, references to water shall be understood to mean deionized or distilled water.
6. Preparation of Sample
6.1 Homogeneous liquid materials may be used without further preparation. 6.2 Heat nonhomogeneous liquid materials until they are homogeneous, then take a portion for analysis. 6.3 Solid samples are subject to surface oxidation which may affect the results. Prepare the sample for analysis by chipping small pieces from a freshly exposed surface ofa lump or lumps and crush to a coarse powder to facilitate weighing and solution. Prepare fresh on the same day, prior to weighing, in order to avoid changes due to surface oxidation of crushed rosin on exposure to the air.