1、Designation:D3505121Standard Test Method forDensity or Relative Density of Pure Liquid Chemicals1This standard is issued under the fixed designation D3505;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A nu
2、mber in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTEEditorial changes were made in Section 11.4 and Section 12 in
3、April 2013.1.Scope*1.1 This test method describes a simplified procedure for themeasurement of density or relative density of pure liquidchemicals for which accurate temperature expansion functionsare known.It is restricted to liquids having vapor pressures notexceeding 79 993 Pascal(0.800 bar,600 m
4、m Hg(0.789 atm)at the equilibration temperature,and having viscosities notexceeding 15 cSt at 20C.1.2 Means are provided for reporting results in the follow-ing units:Density g/cm3at 20CDensity g/mL at 20CRelative density 20C/4CRelative density 15.56C/15.56CNOTE1This test method is based on the old
5、definition of1 L=1.000028 dm3(1 mL=1.000028 cm3).In 1964 the General Conference onWeights and Measures withdrew this definition of the litre and declaredthat the word“litre”was a special name for the cubic decimetre,thusmaking 1 mL=1 cm3exactly.NOTE2An alternative method for determining relative den
6、sity of pureliquid chemicals is Test Method D4052.1.3 The following applies to all specified limits in this testmethod:for purposes of determining conformance with thistest method,an observed value or a calculated value shall berounded off“to the nearest unit”in the last right-hand digitused in expr
7、essing the specification limit,in accordance withthe rounding-off method of Practice E29.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associate
8、d 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.Specific hazardstatements are given in 7.1.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification f
9、or Reagent WaterD1555 Test Method for Calculation of Volume and Weightof Industrial Aromatic Hydrocarbons and CyclohexaneD3437 Practice for Sampling and Handling Liquid CyclicProductsD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD6809 Guide for Qual
10、ity Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and Related Ma-terialsE1 Specification for ASTM Liquid-in-Glass ThermometersE12 Terminology Relating to Density and Specific Gravityof Solids,Liquids,and Gases(Withdrawn 1996)3E29 Practice for Using Significant Digits in Test Data
11、 toDetermine Conformance with Specifications2.2 Other Document:OSHA Regulations,29 CFR paragraphs 1910.1000 and1910.120043.Terminology3.1 Definitions:3.1.1 density,nthe mass of material per unit volume at agiven temperature called the“reference temperature.”Weightcorrected to a standard acceleration
12、 of gravity and corrected forthe buoyant effect of air is used to measure mass.This methodspecifies the use of a beam balance to determine weight so that1This test method is under the jurisdiction of ASTM Committee D16 onAromatic Hydrocarbons and Related Chemicals and is the direct responsibility of
13、Subcommittee D16.04 on Instrumental Analysis.Current edition approved March 1,2012.Published May 2012.Originallyapproved in 1976.Last previous edition approved in 2006 as D3505 96(2006).DOI:10.1520/D3505-12E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer
14、 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.4Available from U.S.Government Printing Office Superintendent of Documen
15、ts,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.*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 States1 no correction for variation in acceleratio
16、n of gravity is neces-sary.When a torsion or spring balance is used,such correctionmust be applied.3.1.2 relative density,nthe ratio of the density of thematerial at reference temperature“t”to the density of purewater,in consistent units,at reference temperature t2.It iscommon practice to use reference temperature t1equal to t2.3.1.2.1 Since the mass of water at 4C is very close to 1g/mL or 1 g/cm3,it is common practice to set the referencetemperature t2for water at 4C.When this is done and thed