ASTM_D_4678_-_15a.pdf

Designation:D467815aStandard Practice forRubberPreparation,Testing,Acceptance,Documentation,and Use of Reference Materials1This standard is issued under the fixed designation D4678;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.1.Scope1.1 This practice covers materials used on an industry-widebasis as reference materials,which are vitally important toconduct product,specification,and development testing in therubber industry.This practice describes the steps necessary toensure that any candidate material,that has a perceived need,can become a Reference Material.The practice sets forth therecommendations on the preparation steps for these materials,on the testing that shall be conducted to permit acceptance ofany candidate material,and on how the documentation neededfor the acceptance shall be recorded for future use and review.1.2 This practice shall be administered by ASTM Commit-tee D11.1.2.1 Important sections of this practice are as follows:SectionSignificance and Use3Preparation of Industry Reference Materials4Overview of Industry Reference Material Testing5Chemical and Physical Specifications for IRM6Reference Material Documentation7Typical Reference Material Use8Recommended Package Size for IRMAnnex A1Recommended Sampling Plans for Homogeneity Testing of anIRMAnnex A2Test Plan and Analysis for Homogeneity of an IRMAnnex A3Test Plan and Analysis to Evaluate an Accepted Reference ValueAnnex A4Statistical Model(s)for IRM TestingAnnex A5Example of Annex Calculations for a Typical IRMAppendix X1Two-Way Analysis of Variance for Calculating SrAppendix X21.3 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.2.Referenced Documents2.1 ASTM Standards:2D4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustriesD5900 Specification for Physical and Chemical Properties ofIndustry Reference Materials(IRM)E122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE826 Practice for Testing Homogeneity of a Metal Lot orBatch in Solid Form by Spark Atomic Emission Spec-trometry3.Significance and Use3.1 Reference materials are vitally important in product andspecification testing,in research and development work,intechnical service work,and in quality control operations in therubber industry.They are especially valuable for refereepurposes.3.2 Categories,Classes,and Types of Reference Materials(RM):3.2.1 Reference materials are divided into two categories:3.2.1.1 Industry Reference Materials(IRM)Materials thathave been prepared according to a specified production processto generate a uniform lot;the parameters that define the qualityof the lot are evaluated by a specified measurement program.3.2.1.2 Common-Source Reference Materials(CRM)Materials that have been prepared to be as uniform as possiblebut do not have established property(parameter)values;theknowledge of a common or single source is sufficient forcertain less critical applications.1This practice is under the jurisdiction ofASTM Committee D11 on Rubber andis the direct responsibility of Subcommittee D11.20 on Compounding Materials andProcedures.Current edition approved July 1,2015.Published August 2015.Originallyapproved in 1987.Last previous edition approved in 2015 as D4678 15.DOI:10.1520/D4678-15A.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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.2 Industry reference materials(IRMs)are divided intoadditional classes and types according to the method ofevaluating the lot parameters and according to the productionprocess for generating the lot material.These are explainedmore fully(refer to Annex A3 and Annex A4 for more detailson the discussion in Section 3).3.2.3 The following lot parameters are important for refer-ence material use:3.2.3.1 Accepted Reference Value(AR Value)An averageIRM property or parameter value established by way of aspecified test program.3.2.3.2 Test Lot Limits(TL Limits)These are limits definedas 63 times the standard deviation of individual IRM testresults across the entire lot for the property or parameter(s)thatdefines lot quality;the measurements are