ASTM E542-22 实验室容量仪器重量校准的标准实施规程.pdf

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards Guides and Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:E542-22 INTERNATIONAL Standard Practice for Gravimetric Calibration of Laboratory Volumetric Instruments This standard is issued under the fixed designation E542:the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision.A number in parentheses indicates the year of last reapproval.A superseript epsilon (8)indicates an editorial change since the last revision or reapproval. 1.Scope 1.4 This standard may be used for the calibration of volu- 1.1 This practice covers procedures for use in the calibration metric instruments made from materials of glass plastic of volumetric instruments that include glassware plasticware various stable metals or any other stable materials provided appropriate volumetric coefficients of expansions are available. and laboratory standards that are in mon use in chemical analytical clinical and calibration laboratories.It is based on 1.5 This standard does not purport to address all of the the gravimetric determination of the quantity of pure water safety concerns if any associated with its use.It is the either contained or delivered at a c...