ASTM_D_1585_-_96_2011.pdf

Designation:D158596(Reapproved 2011)Standard Test Methods forFatty Acids Content of Naval Stores,Including Rosin,TallOil,and Related Products1This standard is issued under the fixed designation D1585;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover the determination of the fattyacids of naval stores,including rosin,tall oil,and relatedproducts.1.2 These test methods may not be applicable to adducts orderivatives of rosin or other naval stores products.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D465 Test Methods for Acid Number of Naval StoresProducts Including Tall Oil and Other Related ProductsD803 Test Methods for Testing Tall OilD890 Test Method for Water in Liquid Pine ChemicalsD1065 Test Method for Unsaponifiable Matter in NavalStores,Including Rosin,Tall Oil,and Related ProductsD1240 Test Methods for Rosin Acids Content of PineChemicals,Including Rosin,Tall Oil,and Related Prod-uctsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Summary of Test Method3.1 The rosin acids content is determined using either themodified potentiometric Wolfe Method or the modified indica-tor Wolfe Method described in Test Methods D1240.Rosinacids 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 accordancewith 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 andthe acid number.3.4.2 For materials with a fatty acid content greater than5%,fatty acid content is calculated from the rosin acids andunsaponifiables 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 orderto avoid slight variables that might occur.3.6 Since the fatty acids remaining in tall oil rosin,tall oil,and other naval stores products consist of oleic acid withvarying amounts of other saturated and unsaturated acids,it hasbecome customary to calculate and report the fatty acid contentas oleic acid.4.Significance and Use4.1 These test methods are designed to broaden the scope ofthe previous edition of these test methods by the inclusion oftall oil as a test material.Test Methods D803 currently includesmethods for the determination of the rosin acid and fatty acidcontent of crude tall oil.Test Methods D803 references TestMethod D1585.4.2 Rosin and tall oil are composed primarily of rosin acidsand fatty acids,and the measurement of these components isimportant in establishing the composition of these materials.5.Purity of Reagents5.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shallconform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where such1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.34 on Pine Chemicals and HydrocarbonResins.Current edition approved June 1,2011.Published June 2011.Originallyapproved in 1958.Last previous edition approved in 2005 as D1585 96(2005).DOI:10.1520/D1585-96R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 specifications are available.3Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.5.2 Unless otherwise indicated,references to water shall beunderstood to mean deionized or distilled water.6.Preparation of Sample6.1 Homogeneous liquid materials may be used withoutfurther preparation.6.2 Heat nonhomogeneous liquid materials until they arehomogeneous,then take a portion for analysis.6.3 Solid samples are subject to surface oxidation whichmay affect the results.Prepare