ASTM_E_2053_-_00.pdf

Designation:E 2053 00Standard Guide forPlanning,Carrying Out,and Reporting Traceable ChemicalAnalyses of Metals,Ores,and Related Materials1This standard is issued under the fixed designation E 2053;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide sets a protocol for generating and reportingmeasurements that are traceable to SI units or CertifiedReference Materials in laboratories that serve the metalsindustries.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-tion of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:E 135 Standard Terminology Relating to Analytical Chem-istry for Metals,Ores,and Related Materials22.2Other Documents:ISO/IEC17025:1999General Requirements for theCompetence of Testing and Calibration Laboratories3ISO Guide 30Terms and Definitions Used in Connectionwith Reference Materials3International Vocabulary of Basic and General Terms inMetrology VIM;ISO:2nded.,199333.Terminology3.1 DefinitionsExcept as defined as follows,for defini-tions of terms used in this guide,refer to Terminology E 135.3.2 certified reference materialreference material,accom-panied by a certificate,one or more of whose property valuesare certified by a procedure which established its traceability toan accurate realization of the unit in which the property valuesare expressed,and for which each certified value is accompa-nied by an uncertainty at a stated level of confidence.(ISOGuide 30:1992)3.3 traceabilityproperty of the result of a measurement orthe value of a standard whereby it can be related,with a stateduncertainty,to stated references,usually national or interna-tional standards,through an unbroken chain of comparisons.(ISO Guide 30:1992)3.4 Uncertainty(of measurement)parameter,associatedwith the result of a measurement,that characterizes thedispersion of values that could reasonably be attributed to themeasured.(International Vocabulary of Basic and GeneralTerms in Metrology VIM(ISO:2nded.,1993)3.5 work plana documented procedure intended for useby a laboratory to meet the measurement traceability require-ments of a defined need.4.Summary of Guide4.1 A client shall prepare a request for traceable measure-ments and submit it to an ISO 17025 compliant laboratory forreview and acceptance.4.2 The laboratory shall prepare a work plan to meet therequirements and obtain concurrence with the client.4.3 The laboratory shall make the measurements and issue areport.5.Significance and Use5.1 This guide establishes basic requirements which shouldbe met by laboratories that generate and report test results thatare traceable to SI units or to certified reference materials thatare traceable to SI units.Traceability of chemical measure-ments is important because it provides a uniform basis for thecomparison of results from different measurement systems andbecause it relates those results to our current knowledge ofphysical laws.5.2 Many laboratories comply with ISO 17025 and partici-pate in proficiency testing programs.Laboratories that areconnected to the same accreditation bodies and proficiency testproviders can be expected to report statistically similar resultson the same sample.However,some test methods and somecertified reference materials are not supported with datatraceable to SI units.Therefore it is possible that fullycompliant laboratories that are not connected to the sameproviders might report statistically different results if they used1This guide is under the jurisdiction of ASTM Committee E01 on AnalyticalChemistry for Metals,Ores,and Related Materials and is the direct responsibility ofSubcommittee E01.22 on Statistics and Quality Control.Current edition approved Jan.10,2000.Published March 2000.2Annual Book of ASTM Standards,Vol 03.05.3Available from American National Standards Institute,11 W.42nd St.,13thFloor,New York,NY 10036.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.the same,non-traceable test method on the same sample.Thisproblem could be alleviated if competent laboratories used testmethods and certified reference materials that were traceable toSI units.5.3 Although some standard test methods and certifiedreference materials provide evidence of traceability to SI units,many others do not.Therefore,all laboratories cannot beexpected to universally meet all requests for traceable analysesuntil the traceability of more test methods and certifiedreference materials is recognized through appropriate docu-mentation.5.4 The primary significance of this guide is that