Designation:E124−94(Reapproved2016)StandardSpecificationforWeighingandDryingApparatusforMicrochemicalAnalysis1ThisstandardisissuedunderthefixeddesignationE124;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversapparatususedforweighinganddryingoperationsinmicrochemicallaboratorypractice.1.2Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Themetricequivalentsmaybeapproximate.NOTE1—ThisspecificationwasoriginallydevelopedbytheCommitteeonMicrochemicalApparatus,DivisionofAnalyticalChemistry,AmericanChemicalSociety.22.ReferencedDocuments2.1ASTMStandards:3E671SpecificationforMaximumPermissibleThermalRe-sidualStressinAnnealedGlassLaboratoryApparatusE920SpecificationforCommerciallyPackagedLaboratoryApparatusE921SpecificationforExportPackagedLaboratoryAppa-ratusE1133PracticeforPerformanceTestingofPackagedLabo-ratoryApparatusforUnitedStatesGovernmentProcure-mentsE1157SpecificationforSamplingandTestingofReusableLaboratoryGlassware3.CombustionBoats3.1CombustionboatsofthreesizesshallconformtotherequirementsinTable1andFig.1,Fig.2,andFig.3.Theseboatsshallbemadeofplatinum-rhodiumalloycontaining3.5%rhodium.4.WeighingBottles4.1WeighingbottlesofsevencapacitiesshallconformtotherequirementsinTable2andFigs.4-9,inclusive.5.WeighingCup5.1TheweighingcupshallconformtotherequirementsshowninFig.11,andshallbemadeofplatinum-rhodiumalloycontaining3.5%rhodium.ThecupisdesignedtobeusedasasamplecontainertofitintotheweighingbottleshowninFig.5,andisusefulforweighinghygroscopicmaterials.6.WeighingTubes6.1WeighingtubesofthreetypesshallconformtotherequirementsshowninFig.12,Fig.13,andFig.14.Thesetubesshouldpreferablybemadeofsoda-limeglass.7.Spatulas7.1Spatulasoffourtypes,andpreferablymadeofstainlesssteel,shallconformtothefollowingrequirements:7.1.1TypeA(Fig...
