2023·02分析与检测68ModernChemicalResearch当代化工研究2023·02分析与检测68ModernChemicalResearch当代化工研究自动气相分子吸收光谱法测定水体中高锰酸盐指数*柯鹏振1刘雄2吴雅琴1夏丽星1朱娟1康得军3*(1.湖北省生态环境厅咸宁生态环境监测中心湖北4371002.湖北省生态环境监测中心站湖北4300713.福州大学土木工程学院福建350108)摘要:采用亚硝酸盐作为还原剂,以间接测定亚硝酸盐含量的方式,建立了以气相分子吸收光谱法来快速定量测定水中高锰酸盐指数的方法。试验结果表明,标准曲线相关系数大于0.9995,该方法的检出限为0.066mg/L,检出范围为0.4~5.00mg/L,相对标准偏差为1.56%~1.67%。此外,本文还研究了气相分子吸收光谱法与国际法采用酸式或碱式消解不同水样的试验,进一步证明该法具有准确度高、精密度高和测定速度快的特点,适合分析大批量水样、样品消解和数据分析,可实现全自动化,提高工作效率。关键词:气相分子吸收光谱法;高锰酸盐指数;亚硝酸盐;自动中图分类号:X文献标识码:AARapidandAutomatedTestingMethodforPermanganateIndexinWaterUsingGasPhaseMolecularAbsorptionSpectrometerKePengzhen1,LiuXiong2,WuYaqin1,XiaLixing1,ZhuJuan1,KangDejun3*(1.XianningEcologicalEnvironmentMonitoringCenterofHubeiEcologicalEnvironmentDepartment,Hubei,4371002.HubeiEnvironmentalMonitoringStation,Hubei,4300713.DepartmentofCivilEngineering,FuzhouUniversity,Fujian,350108)Abstract:ThisstudysetsupanewfastquantitativeanalysismethodtodetectPermanganateIndexbyusingnitriteasreducingagentandbyindirectdeterminationofnitritecontent.Theresultsindicatedthatthecorrelationcoefficientofthestandardcurvewasgreaterthan0.9995,thedetectionlimitofthemethodwas0.066mg/L,thedetectionrangewas0.4~5.00mg/L,andtherelativestandarddeviationswere1.56%~1.67%.Inaddition,thisstudycarriedoutexperimentsusingacidorbasedigestionofdifferentwatersamplesbygasphasemolecularabsorptionspectroscopyandinternationallaw,whichfurtherprovedthatthismethodhasthecharacteristicsofhighaccuracy,highprecisionandfastdeterminationspeed.Thismethodissuitableforanalyzinglargequantitiesofwatersamples,sampledigestionanddataanalysis.Itcanrealizefullautomationandimproveworkefficiency.Keywords...