【英文标准名称】:Ambientair;determinationofthemassconcentrationofsulfurdioxide;tetrachloromercurate(TCM)/pararosanilinemethod
【原文标准名称】:环境空气二氧化硫质量浓度的测定四氯汞钾(TCM)/副品红分光光度法
【标准号】:ISO6767-1990
【标准状态】:现行
【国别】:国际
【发布日期】:1990-09
【实施或试行日期】:1990-09-01
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC146
【标准类型】:()
【标准水平】:()
【中文主题词】:质量;试验;含量测定;二氧化硫;分光光度法;浓缩;空气污染;空气
【英文主题词】:Air;Airpollution;Concentration;Determinationofcontent;Quality;Spectrophotometry;Sulphurdioxide;Testing;Tests
【摘要】:ThisInternationalStandardspecifiesaspectro-photometricmethod,knownasthetetrachloro-mercurate(TCM)/pararosanilinemethod,forthede-terminationofthemassconcentrationofsulfurdi-oxideinambientairwithintherangeof20μg/mtoabout500μg/m.Thesamplingperiodis30minto60min.Ifalongersamplingperiodthan60minisused,orhigherconcentrationsofsulfurdioxide(uptoabout2000μg/m)areexpected,careisnecessarytoen-surethattheconcentrationsofsulfurdioxideintheabsorptionsolutiongiveninclause6,paragraph2arenotexceeded.Thiscanbeachievedbyare-ductionofthevolumeflowrateduringsampling.Samplesolutionsobtainedbythisproceduremaybestoredforupto24hbeforemakingmeasure-ments,providedthattheyarekeptinarefrigeratoratabout5℃.Substanceswhichareknowntointerfereandwhichmightbepresentintheairbeingsampledarelistedin7.5Indicationsoftheprecisionandaccuracyofthemethod,andofthelowerdetectionlimitaregivenin8.2.Detectionlimit,standarddeviationsandinterfer-encesqualifytheTCM-methodfororientatingfieldmeasurementsinthehigherconcentrationrange.Whenmoreaccuratemeasurementsarenecessary,instrumentswhicharespeciallytestedandcali-bratedshouldbeused.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:10P.;A4
【正文语种】:英语