ASTM_C_471M_-_17e1.pdf

Designation:C471M171Standard Test Methods forChemical Analysis of Gypsum and Gypsum Products(Metric)1This standard is issued under the fixed designation C471M;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.1NOTECorrected equation reference in 9.6 and restored item(6)to list in 16.1 editorially in August 2017.1.Scope*1.1 These test methods cover the chemical analysis ofgypsum and gypsum panel products,including gypsum ready-mixed plaster,gypsum wood-fibered plaster,and gypsumconcrete.1.2 The test methods appear in the following order:SectionsPreparation of Sample4Complete Procedure5 16Alternative Procedure for Analysis of Free Water in17Gypsum Using a Moisture BalanceAlternative Procedure for Analysis of Combined Water in18Gypsum Using a Moisture BalanceAlternative Procedure for Analysis for Calcium Sulfate by19Ammonium Acetate MethodAlternative Procedure for Analysis for Sodium Chloride by20the Coulometric MethodDetermination of Sand in Set Plaster21Wood-Fiber Content in Wood-Fiber Gypsum Plaster22Optional Procedure for Analysis for Sodium by the Atomic23Absorption MethodOptional Procedure for Analysis for Sodium by Flame24PhotometryDetermination of Orthorhombic Cyclooctasulfur(S8)in25Ggypsum Panel ProductsGeneral ProvisionsDetermination of Orthorhombic Cyclooctasulfur(S8)in26Gypsum Panel Products by Gas ChromatographEquipped with a Mass Spectrometer(GS/MS)Determination of Orthorhombic Cyclooctasulfur(S8)in27Gypsum Panel Products by Gas ChromatographEquipped with an Electron Capture Detector(GC/ECD)Determination of Orthorhombic Cyclooctasulfur(S8)in28Gypsum Panel Products by High-performance LiquidChromatograph Equipped with and Ultraviolet Detector(HPLC UV)1.3 The text of this standard references notes and footnotesthat provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requirements of the standard.1.4 The values stated in SI units are to be regarded as thestandard.1.5 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,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 standard-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:2C11 Terminology Relating to Gypsum and Related BuildingMaterials and SystemsC22/C22M Specification for GypsumC28/C28M Specification for Gypsum PlastersC59 Specification for Gypsum Casting Plaster and GypsumMolding PlasterC61 Specification for Gypsum Keenes CementC317/C317M Specification for Gypsum ConcreteC778 Specification for Standard SandC842 Specification for Application of Interior Gypsum Plas-terD1193 Specification for Reagent WaterD1428 Test Method for Test for Sodium and Potassium InWater and Water-Formed Deposits by Flame Photometry(Withdrawn 1989)3D2013 Practice for Preparing Coal Samples for AnalysisE11 Specification for Woven Wire Test Sieve Cloth and TestSieves1These test methods are under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and are the direct responsi-bility of Subcommittee C11.01 on Specifications and Test Methods for GypsumProducts.Current edition approved June 1,2017.Published July 2017.Originally approvedin 1961.Last previous edition approved in 2016 as C471M 16A.DOI:10.1520/C0471M-17E01.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with 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.1 E177 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.Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminolog