ASTM_D_1258_-_05.pdf

Designation:D 1258 05Standard Test Methods forHigh-Gravity Glycerin1,2This standard is issued under the fixed designation D 1258;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(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 These test methods cover the procedures for the sam-pling and testing of glycerin(1,2,3-propanetriol)for use in themanufacture of alkyd resins and other synthetic resins.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 For purposes of determining conformance of an ob-served or a calculated value using this test method to relevantspecifications,test result(s)shall be rounded off“to the nearestunit”in the last right-hand digit used in expressing thespecification limit,in accordance with the rounding-off methodof Practice E 29.1.4 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.1.5 For hazard information and guidance,see the suppliersMaterial Safety Data Sheet.2.Referenced Documents2.1 ASTM Standards:3D 891 Test Methods for Specific Gravity,Apparent,ofLiquid Industrial ChemicalsD 1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D 1613 Test Method for Acidity in Volatile Solvents andChemical Intermediates Used in Paint,Varnish,Lacquerand Related ProductsD 4052 Test Method for Density and Relative Density ofLiquids by Digital Density MeterE 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 300 Practice for Sampling Industrial Chemicals3.Significance and Use3.1 These test methods provide a measurement of purity ofhigh-gravity glycerin.The results of these measurements canbe used for specification acceptance.4.Sampling4.1 Sample the material in accordance with Practice E 300.5.Procedure5.1 Apparent Specific GravityDetermine the apparent spe-cific gravity by a pycnometer method that is accurate to 0.0002,such as in Test Methods D 891 or D 4052.5.2 ColorDetermine the color in accordance with TestMethod D 1209.5.3 Sulfate AshWeigh to the nearest 0.001 g,50 g ofglycerin sample,into an open,shallow dish of porcelain,platinum,or other suitable material.Heat the dish carefullyuntil the contents can be ignited with a flame and allow it toburn without further application of heat in a place free ofdrafts.When burning ceases,allow the dish to cool to roomtemperature and then moisten the residue with 0.5 mL ofconcentrated sulfuric acid.Cautiously heat the dish until fumesare no longer evolved and the carbon is completely consumed.Ignite,cool in a desiccator,and weigh to 1 mg.Repeat untilweight is constant within 1 mg.Calculate the percent of sulfateash,A,as follows:A 5R/S!3 100(1)where:R=sulfate ash,g,andS=specimen used,g.NOTE1The sulfate ash procedure is equivalent to the“Residue onIgnition”determination for glycerin in the Pharmacopeia of the UnitedStates,nineteenth revision.5.4 Acid ValueDetermine the percent acid in accordancewith Test Method D 1613.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.35 on Solvents,Plasticizers,and ChemicalIntermediates.Current edition approved May 15,2005.Published May 2005.Originallyapproved in 1053.Last previous edition approved in 1999 as D 1258 95(1999).2Also known as 1,2,3-propanetriol and glycerol.3For 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.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.6.Precision and Bias6.1 PrecisionThe precisions of the test procedures pre-sented in these test methods have not been determined.6.2 BiasThe biases of the test procedure presented in thisstandard have not been determined because no material havingan accepted value is available.7.Keywords7.1 glycerine;glycerol;high-gravityglycerin;1,2,3-propunetriol;trihydroxy propaneSUMMARY OF CHANGESCommittee D01.35 has identified the location of selected changes to this standard since the last issue(D 1258 95(1999)that may impact the use of this standard.(1)Added reference to Practice E 29 in 1.3 of the Scopesection.(2)Added Practice E 29 to list of Referenced Documents.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any it