离子色谱-脉冲安培法测定卷烟主流烟气中的硫化氢

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1、离子色谱-脉冲安培法测定卷烟主流烟气中的硫化氢刘献军作者简介：刘献军（1972-），男，硕士，工程师。研究方向：卷烟烟气化学及烟气分析，E-mail:njliuxianjun@sina.com。沈晓晨庄亚东张映（江苏中烟工业有限责任公司技术研发中心，南京210010）摘要：提出了卷烟主流烟气中硫化氢的离子交换色谱-脉冲安培测定方法。硫化氢经100mmol/L氢氧化钠、400mmol/L乙酸钠、0.5%乙二胺、20mmol/L抗坏血酸组成的捕集液捕集后，使用100mmol/L氢氧化钠、400mmol/L

2、乙酸钠、0.5%乙二胺组成的淋洗液（流量为1.0mL/min）在IonPacAS7阴离子交换色谱柱(250mm×4mm)上分离，以银电极、脉冲安培检测器检测。结果表明：硫离子检出限（IDL）为1.52µg/L（t(α=0.01,n-1=7)=2.998），硫化氢检出限（MDL）为20.14ng/支；平均加标回收率在92.38%~96.38%之间，相对标准偏差在2.03%~3.26%之间。关键词：硫化氢；阴离子交换色谱；脉冲安培检测器；卷烟主流烟气中图分类号：657.7文献标识码：A文章编号：Deter

3、minationofHydrogenSulfideinMain-streamSmokeofCigarettebyAnionExchangeChromatographywithPulsedAmperometricDetectorLIUXian-jun,SHENXiao-chen,ZHUANGYa-dongandZHANGYing(R&DCenter,ChinaTobaccoJiangsuIndustrialCo.,Ltd.,Nanjing210019,China)Abstract:Anovelmetho

4、dforthedeterminationofhydrogensulfide(H2S)inmain-streamsmokeofcigarettebyanionexchangechromatographywithpulsedamperometricdetector(AEC-PAD)wasdeveloped.ThetrappingconditionsofH2Sinmainstreamsmokewereinvestigated.Itwasfoundthattheabsorptionsolutioncompos

5、edof100mmol/LNaOH,400mmol/Lsodiumacetate,0.5%2-ethanediamineand20mmol/LascorbicacidcouldtrapH2Sinmain-streamsmokeinthewhole.S2-inabsorptionsolutionwasseparatedonananionexchangecolumnIonPacAS7(250mm×4mm),withtheuseofamobilephasecomposedof100mmol/LNaOHand

6、400mmol/Lsodiumacetateand0.5%2-ethanediamineataflowrateof1.0mL/minandwasdetectedbypulsedamperometricdetectorwithAg/AgClelectrode.Undertheaboveoptimalconditions,thecalibrationcurvewaslinearintheconcentrationrangeof0.1mg/L~5.0mg/LS2-withacorrelationcoeffi

7、cientof0.99950.ThespikedrecoveriesofS2-wereintherangeof92.38%~96.38%withrelativestandarddeviations(RSDs)of2.03%~3.26%.Instrumentdetectionlimit(IDL)ofS2-was1.52μg/L(EPA,t(α=0.01,n-1=7)=2.998).Methoddetectionlimit(MDL)ofH2Sinmain-streamsmokeofcigarettewas

8、20.14ng/cig..Themethodwassimple,rapidandaccurate,andcouldbeappliedforthedeterminationofH2Sinmain-streamsmokeofcigarette.Keywords:H2S;anionexchangechromatography;pulsedamperometricdetector;main-streamsmokeofcigarette烟草中有含硫蛋白质及含硫氨基