Designation:D7773−19StandardTestMethodforDeterminationofVolatileInorganicAcids(HCl,HBr,andHNO3)UsingFilterSamplingandSuppressedIonChromatography1ThisstandardisissuedunderthefixeddesignationD7773;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisintendedforuseinthedeterminationofthetime-weightedaveragemassconcentrationofhydrogenchloridegasandhydrochloricacidmist,hydrogenbromidevaporandhydrobromicacidmist,andnitricacidvaporandmistinworkplaceair.Thesamplesarecollectedonanalkali-impregnatedquartzfiberfilterandanalyzedbyionchromatography.Thistestmethodisalsoappropriateformeasuringshorttermexposures.1.2ThistestmethodassumesthatairsamplesarecollectedusingappropriateandapplicableASTMInternationalstandardsforsamplingofworkplaceair.1.3Theprocedureistargetedforoccupationalandenviron-mentalhygienemonitoringpurposes.1.4Nodetailedoperatinginstructionsareprovidedbecauseofdifferencesamongvariousmakesandmodelsofsuitableinstruments.Instead,theanalystshallfollowtheinstructionsprovidedbythemanufactureroftheparticularinstrument.Thisstandarddoesnotaddresscomparativeaccuracyofdifferentdevicesortheprecisionbetweeninstrumentsofthesamemakeandmodel.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thistestmethodcontainsnotes,whichareexplanatoryandnotpartofmandatoryrequirementsofthestandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.8Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentof...
