1、Designation:D448790(Reapproved 2020)Standard Test Methods forAnalysis of Calcium Borosilicate1This standard is issued under the fixed designation D4487;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A numbe
2、r 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 analysis of the pigmentcommercially known as calcium borosilicate.1.2 The test methods appear in the following orde
3、r:Test MethodsSectionsSilicon Dioxide(SiO2)6 9Iron Oxide(Fe2O3)10 13Boron Trioxide(B2O3)17 20Calcium Oxide(CaO)21 23Moisture and Volatile Matter24Water of Hydration25 to 26Coarse Particles27Oil Absorption281.3 Individual specimens may be used for the direct deter-minations of SiO2,B2O3,and CaO.SiO2a
4、nd Fe2O3should beremoved before the determination of the B2O3and CaO.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is
5、 theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on stand
6、ard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D185 Test Methods for Coarse Particles in Pigments
7、D280 Test Methods for Hygroscopic Moisture(and OtherMatter Volatile Under the Test Conditions)in PigmentsD281 Test Method for Oil Absorption of Pigments bySpatula Rub-outD1193 Specification for Reagent Water3.Significance and Use3.1 These test methods compile in one place,recommendedprocedures for a
8、nalysis of the pigment known commercially ascalcium borosilicate.This pigment is used extensively in paintsand the composition is important to the user and producer.4.Reagents4.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall rea
9、gents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Societywhere such specifications are available.3Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening thea
10、ccuracy of the determination.4.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean reagent water conformingto Type II of Specification D1193.4.3 Concentration of Acids and Ammonium HydroxideWhen acids and ammonium hydroxide are specified by nameor chemical form
11、ula only,it should be understood that concen-trated reagents of the following specific gravity are intended:Hydrochloric acid(HCl)1.19Nitric acid,(HNO3)1.42Sulfuric acid(H2SO4)1.84Ammonium hydroxide(NH4OH)0.905.Preparation of Samples5.1 Thoroughly mix and comminute the sample beforetaking portions f
12、or analysis.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.31 on Pigment Specifications.Current edition approved June 1,2020.Published July 2020.Originally approvedin 19
13、85.Last previous edition approved in 2014 as D4487 90(2014).DOI:10.1520/D4487-90R20.2For 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 o
14、nthe ASTM website.3ACS Reagent Chemicals,Specifications and Procedures for Reagents andStandard-Grade Reference Materials,American Chemical Society,Washington,DC.For suggestions on the testing of reagents not listed by the American ChemicalSociety,see Analar Standards for Laboratory Chemicals,BDH Lt
15、d.,Poole,Dorset,U.K.,and the United States Pharmacopeia and National Formulary,U.S.Pharma-copeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance wit
16、h internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.SILICON DIOXIDE6.Apparatus6.1 Evaporating Casserole,250-mL capacity.6.2 Hot Plate.6.3 Porcelain Filtering Crucible,medium porosity,30-mLcapacity.6.4 Drying Oven,maintained at 100 6 5C.6.5 Muffle Furnace.7.Reagents7.1 Hydrochloric Acid(1+1).7.2 H
