, , ,(,610064) :在40℃下,高浓度ClO2气体在盘管中迅速溶解于水中达到平衡,使用分光光度法检测平衡溶液的浓度,从而间接测定出ClO2气体的浓度。该方法可检测体积分数大于0.14%的ClO2,响应时间为15~30s,相对标准偏差为0.3%,与连续碘量法相比测定结果没有显著性差异(P0.01),全过程中未使用化学试剂,操作简便,干扰小,适用于的高浓度ClO2气体在线检测。:高浓度;ClO2气体;在线检测:O657.32 :A :1000-0720(2005)08-0035-04 ClO2、、、、、[1],ClO2。ClO2,,ClO2,10%()[2],ClO2,。,,ClO2,、。,,。ClO2,,,ClO2[3],,。ClO2,-KI、CCl4-KI、-KI,I2[4],,,ClO2。ClO2,,ClO2,,,。1 1,1,6,ClO2,,8,ClO2。1.1 ClO2ClO2,[5],,,ClO2ClO2,ClO2ClO2。1.2 ,ClO2,,,,ClO2,。,1%ClO2,ClO2,ClO2ClO2ClO2。—35—24820058 ChineseJournalofAnalysisLaboratory Vol.24.No.82005-8:2004-08-16;:2004-10-25:(1979-),,DOI:10.13595/j.cnki.issn1000-0720.2005.01811 Fig.1 Schematicofaiagrammethod1-;2-;3-;4-;5-;6-;7-;8-;9-;10-;11、12、13、14-2 2.1 752();DBD-300();LZB-6();SHZ-III();WM-4();()。NaClO3;0.0100mol/LNa2S2O3;KI,2.50g/L;(1+1)H2SO4;HAc;H2O2(30%)。,。2.2 (1+1)H2SO4120mL,,60℃。NaClO350g,30%H2O250mL,NaClO3,。NaClO3H2O2,,ClO2,。[8],ClO2,ClO298%,。2.3 14,12,13,。12,13,,5、6,11,,6,14,(),ClO2。ClO2,1310ClO2。3 3.1 ClO2(0.98mmol/L)Cl2(4.0mmol/L)(2)。ClO2360nm1,ε1190L·mol-1·cm-1。ClO2,ClO2,,400~420nm,600~230L·mol-1·cm-1。4.5g/LClO2(40℃,10%ClO2),1.0,A=εbc415nm0.5mm。0.5mm,ClO2;0.5mm,。415nmCl2,ClO2。2 ClO2Cl2UVFig.2 UVabsorptionspectraofClO2andCl23.2 ClO2,ClO2,,ClO2,。,。,40℃ClO2—36—24820058 ChineseJournalofAnalysisLaboratory Vol.24.No.82005-8,。3.3 。,50cm,8mm,30mm。,,。。ClO2。,,ClO2,;,ClO2,,ClO2,。1000,9.52%ClO2,4mm,30mm。,60cm,;60cm,,60cmClO2。3.4 40℃,0.5mm,,8.23%ClO2,1。1,1000,ClO2。,,,,。3.5 pHHClNaOHpH,pH,8.2%ClO2,pH5.0~9.00.881~0.897,。pH,pH。3.6 ,ClO20.14%~11.1%ClO2,y=9.2633φ+0.0145,r=0.9990。ClO20.14%~11.1%。ClO2,,。1 Tab.1 RelationshipbetweenabsorbanceandflowsofwaterandClO2gas/(L/min)/(mL/min)1.00.910.630.8720.8791.51.501.301.130.910.8770.8750.8760.8832.02.001.751.500.910.8720.8740.8760.8802.52.422.001.500.910.8770.8720.8780.8793.02.902.422.001.300.910.8720.8750.8760.8780.8753.53.402.902.421.500.910.8740.8730.8740.8780.8773.7 Cl2,Cl2。ClO2Cl2,ClO230%(5%)。40℃,50%,0.012,。3.8 —37—24820058 ChineseJournalofAnalysisLaboratory Vol.24.No.82005-8ClO2,30s,6,0.3%。3.9 ClO2,2。,F=0.00104,F0.01(1,10)=3.23,0.01。r=0.9990。2 Tab.2 Comparisonoftheresultsobtainedbythismethodandthecontinuousiodimetry/%/%18.057.95210.310.933.583.4046.706.7554.023.9865.235.203.10 15~30s,。[1] ,.,1998,15(2):94[2] .,2003,(5):46[3] LarsS,DisaT.SvenskPappersidning,1978,81(4):114[4] ..:,2000.162[5] GauwRD,EmmertGLetal.Talanta,1999,50:1073[6] .———.:,2000.46[7] KolarJJ,LindgenBO.TappiJournal,1983,67(8):81[8] ,.,1997,30(4):66On-linedeterminationofhighconcentrationchlorinedioxidegasZHOUDe-ping,ZHANYu,CHENGQiongandXIEJia-li(TheCollegeofChem-istry,SichuanUniversity,Chengdu610064),FenxiShiyanshi,2005,24(8):35~38Abstract:At40℃,highconcentrationchlorinedioxidegaswasdissolvedinwatertoreachanequilibrium.E-quilibriumconcentrationwasdeterminalbyspectropho-tometry,andthentheconcentrationofchlorinedioxidegaswasindirectlyobtained.Theresultsindicatethatmorethan0.14%concentrationcanbedetectedbythismethod.Theresponsetimeis15~30s,andRSDis0.3%.Itcansatisfyneedforon-linedeterminationofhighconcentrationchlorinedioxidegas.Thereisnosig-nificantdifference(P0.01)betweenthismethodandthecontinuousiodimetry.At40℃,highconcentrationchlorinedioxidegaswasrapidlydissolvedinwatertoreachanequilibrium.Equilibriumconcentrationwasde-terminedbyUV-spectrophotometry,andthenthecon-centrationofchlorinedioxidegaswasindirectlyob-tained.Keywords:Highconcentration;Chlorinedioxidegas;On-linedetermination—38—24820058 ChineseJournalofAnalysisLaboratory Vol.24.No.82005-8