作者:标准资料网 时间:2024-05-11 15:30:16   浏览:9966   来源:标准资料网

【英文标准名称】:StandardPracticeforExaminationofWater-FormedDepositsbyChemicalMicroscopy
【原文标准名称】:用化学显微镜作水沉积物的检验的标准实施规程
【标准号】:ASTMD1245-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D19.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:晶体学;沉积;微量化学;显微术;定性分析;折射指数
【英文主题词】:crystallography;deposits;microchemistry;microscopy;qualitativeanalysis;refractiveindex
【摘要】:Chemicalcompositionofwater-formeddepositsisamajorindicatorofproperorimproperchemicaltreatmentofprocesswater,andisoftenanindicatorofoperationalparametersaswell,forexample,temperaturecontrol.Thispracticeallowsforrapiddeterminationofconstituentspresentinthesedeposits,particularlythoseindicationsofimproperwatertreatment,sincetheyusuallyhaveverydistinctiveandeasilyrecognizedopticalproperties.Thispractice,whereapplicable,eliminatestheneedfordetailedchemicalanalysis,whichistime-consuming,andwhichdoesnotalwaysrevealhowcationsandanionsaremutuallybound.Qualitativeuseofthispracticeshouldbelimitedtothosedepositswhosecontrolisgenerallyknownorpredictable,basedontreatmentandfeedwatermineralcontent,andwhoseconstituentsarecrystalline,orinotherwaysopticallyormorphologicallydistinctive.Ifthesecriteriaarenotmet,othertechniquesofanalysisshouldbeused,suchasPracticeD2332orTestMethodsD3483,orboth.Quantitativeuseofthispracticeshouldbelimitedtoestimatesonly.Formoreprecisequantitativeresults,othermethodsshouldbeused(see5.3).1.1Thispracticedescribesaprocedurefortheexaminationofwater-formeddepositsbymeansofchemicalmicroscopy.Thispracticemaybeusedtocomplementothermethodsofexaminationofwater-formeddepositsasrecommendedinPracticesD2331oritmaybeusedalonewhennootherinstrumentationisavailableorwhenthesamplesizeisverysmall.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:13_060_50
【页数】:7P.;A4
【正文语种】: