1、Designation:D448790(Reapproved 2014)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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D185 Test Methods for Coarse Particles in PigmentsD280 Test Methods for Hygroscopic
6、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 analysis of the pigment known comme
7、rcially 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 reagents shall conform to the specifi
8、cations 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 theaccuracy of the determination.4.2 P
9、urity 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 formula only,it should be understood t
10、hat 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 for analysis.SILICON DIOXIDE6.Appar
11、atus6.1 Evaporating Casserole,250-mL capacity.6.2 Hot Plate.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 Dec.1,20
12、14.Published December 2014.Originallyapproved in 1985.Last previous edition approved in 2008 as D4487 90(2008).DOI:10.1520/D4487-90R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informa
13、tion,refer to the standards Document Summary page onthe ASTM website.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washington,DC.For suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for LaboratoryChemicals,B
14、DH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.3 Porcelain Filtering Crucible,medium porosity,30-mL
15、capacity.6.4 Drying Oven,maintained at 100 6 5C.6.5 Muffle Furnace.7.Reagents7.1 Hydrochloric Acid(1+1).7.2 Hydrochloric Acid(1+19).7.3 Hydrochloric Acid(1+99).8.Procedure8.1 Introduce a 1-g specimen,weighed to the nearest 0.1 mginto an evaporating casserole.Add 50 mL of HCl(1+1)andthoroughly mix.8.
16、2 Place the casserole on a hot plate and evaporate care-fully to dryness.8.3 Place the casserole in the oven at 100C for 2 h.Do notallow the oven temperature to exceed 105C at any time.Remove the casserole and allow to cool for 10 min.8.4 Completely wet the residue with 25 mL of HCl(1+1)and cover the casserole with a watch glass.Warm just toboiling on a hot plate and maintain for 10 min.8.5 Add 25 mL of water,free any material from the sides ofthe casserole with a stirring rod,and immediately fi