ASTM F2576-2015a Standard Terminology Relating to Declarable Substances in Materials《有关材料中可申报物质的标准术语》.pdf
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1、Designation: F2576 15aStandard Terminology Relating toDeclarable Substances in Materials1This standard is issued under the fixed designation F2576; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This terminology standard contains terms, definitions,descriptions of terms, nomenclature, and explanations of acro-nyms and symbols specific
3、ally associated with standards underthe jurisdiction of ASTM International Committee F40 onDeclarable Substances in Materials.1.2 This terminology may also be applicable to documentsnot under the jurisdiction of ASTM F40, in which case thisterminology may be referenced in those documents.2. Referenc
4、ed Documents2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 Other References:ASTM Dictionary of Engineering Science available from ASTMInternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959; ASTM St
5、ock Number: DEF00.4Standard ISO 472 is under the jurisdiction of ISO TC 61 on Plastics and is thedirect responsibility of ISO TC 61 SC 1 on Terminology.5ISO/IEC Guide 2 is under the jurisdiction of the ISO Technical ManagementBoard.6VIM is under the jurisdiction of the Joint Committee for Guides in
6、Metrology(JCGM) and is the direct responsibility of JCGM-WG2.7Currie, Lloyd A., Pure or (B) any other mineral or its derivatives determinedby the Secretary of State to be financing conflict in the DemocraticRepublic of the Congo or an adjoining country.conflict mineral free article, nan article not
7、containingconflict minerals (or metals derived from conflict minerals)as defined in the United States by H. R. 4173 (Dodd-FrankWall Street Reform and Consumer Protection Act), section1502.de minimus limit, nfrom Latin de minimus meaning of nosignificant consequence; in regulatory contexts, the maxi-
8、mum amount that evokes no legal consequence, that is, themaximum allowed amount.detection limit, nthe smallest net signal or the derivedconcentration that can be distinguished from the backgroundsignal or blank at a specified confidence level using aspecified measurement process.DISCUSSIONIUPAC defi
9、nition per LloydA. Currie, Nomenclature inEvaluation of Analytical Methods Including Detection and Quantifica-tion Capabilities.intentionally added substance, na chemical element, com-pound or ion that is purposely included within or on asubstance, material or object.percent by mass, nunits expressi
10、ng the ratio of analyte massto sample mass multiplied by 100.DISCUSSIONFor expression in SI units, the simple ratio of massunits (for example, mg/kg) is to be preferred over percent by mass.However, percent by mass (also written as % mass or mass %) iscommonly used. In addition, the expressions weig
11、ht % and % byweight are often substituted as synonyms for the more correct % mass.Definition comes from the International Vocabulary of Basic andGeneral Terms in Metrology (VIM).percent by weight, nsee percent by mass.quantification limit, nperformance characteristic that marksthe ability of a chemi
12、cal measurement process to adequately“quantify” an analyte.DISCUSSIONThe ability to quantify is generally expressed in termsof the signal or analyte value that will produce estimates having aspecified relative standard deviation, commonly 10 %. IUPAC defini-tion per Lloyd A. Currie, Nomenclature in
13、Evaluation of AnalyticalMethods Including Detection and Quantification Capabilitiesrare earth elements, nas defined by IUPAC, any of thefollowing seventeen chemical elements: scandium, yttrium,lanthanum, cerium, praseodymium, neodymium,promethium, samarium, europium, gadolinium, terbium,dysprosium,
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