1、Designation:D 1258 95(Reapproved 1999)Standard 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 p
2、arentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 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 ot
3、her synthetic resins.1.2 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 u
4、se.1.3 For hazard information and guidance,see the suppliersMaterial Safety Data Sheet.2.Referenced Documents2.1 ASTM Standards:D 891 Test Methods for Specific Gravity,Apparent,ofLiquid Industrial Chemicals3D 1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)4D 1613 Test Method for A
5、cidity in Volatile Solvents andChemical Intermediates Used in Paint,Varnish,Lacquerand Related Products4D 4052 Test Method for Density and Relative Density ofLiquids by Digital Density Meter5E 300 Practice for Sampling Industrial Chemicals63.Significance and Use3.1 These test methods provide a measu
6、rement 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 accur
7、ate 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 conte
8、nts 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 evolv
9、ed 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 5 sulfate ash,g,andS 5 specimen used,g.NOTE1The sulfate ash procedure is equivalent to the“Residue
10、 onIgnition”determination for glycerin in the Pharmacopeia of the UnitedStates,nineteenth revision.5.4 Acid ValueDetermine the percent acid in accordancewith Test Method D 1613.6.Precision and Bias6.1 PrecisionThe precisions of the test procedures pre-sented in these test methods have not been deter
11、mined.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-gravity glycerin;1;2;3-propunetriol;trihydroxy propane1These test methods are under the jurisdiction ofASTM
12、 Committee D-1 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved Feb.15,1995.Published April 1995.Originallypublished as D 1258 53.Last previous edition D 1258 90
13、.2Also known as 1,2,3-propanetriol and glycerol.3Annual Book of ASTM Standards,Vol 15.05.4Annual Book of ASTM Standards,Vol 06.04.5Annual Book of ASTM Standards,Vol 05.02.6Annual Book of ASTM Standards,Vol 15.05.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.The
14、American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any suchpatent rights,and the risk of infringeme
15、nt of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for
16、 additional standardsand should be addressed to ASTM Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted byASTM,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA19428-2959,United States.Individual reprints(single or multiple c
