ASTM D803-15(R2020) pdf free download

ASTM D803-15(R2020) pdf free download.Standard Test Methods for Testing Tall Oil
1. Scope
1.1 These test methods cover the test procedures to be applied to whole tall oils or refined tall oils. Previous editions of these test methods have described test procedures that are used to test tall oil fatty acid, rosin, and other tall oil-derived products as well as test crude and refined tall oil. Consequently, these test methods are widely cited in reference books and industry literature for the testing of tall oil-derived products. 1.1.1 In this current revision, procedural details of some of the often-cited test methods have been removed and the test methods consolidated with other existing test methods. In such cases the consolidated methods, applicable to all tall oil- derived products. 1.2 The procedures appear in the following order:1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.4 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. 1.5 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. Significance and Use
3.1 Tall oil, both crude and refined, is an important by- product of the alkaline (kraft) pulping of pine wood. It consists primarily of fatty acids, resin acids, and neutral materials; the levels of these various components depend on factors such as the species of pine tree, geographic location, climate, etc. 3.1.1 Tall oil is used primarily as a commercial source of fatty acids and rosin, and, therefore, reliable methods for the analysis of these components is necessary.
4. Purity of Reagents
4.1 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. 4 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. 4.2 Unless otherwise indicated, references to water shall be understood to mean distilled water or deionized water.
5. Sampling
5.1 As with many industrial chemicals, the procedure for obtaining a representative sample of tall oil depends on the container to be sampled and the uniformity ofthe material to be sampled. No specific standard procedure for sampling tall oil has been developed but Test Method D1466 and Practice E300 describe applicable methods when the tall oil contains no separated solids or separated water. If rosin has separated, the rosin can be redissolved by heating and agitating the material to be sampled until it is homogeneous. If separated water is present, special procedures should be followed to ensure that a representative sample be obtained. The selection of an appro- priate procedure will depend on the water content and the type of container being sampled.
6. Conditioning
6.1 Heat the entire sample in a closed container fitted with a capillary vent or its equivalent. Some kind of agitation, even if done occasionally by hand, saves much time. Heat in a forced-air oven in order to dissolve any crystalline material. A temperature of 100°C is usually sufficient to dissolve crystals present in crude tall oil, but a temperature as high as 160°C may be required to remove rosin crystals from distilled tall oil. Withdraw the specimens only when all crystalline matter has dissolved and when the entire sample becomes a homogeneous fluid after thorough stirring.