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3(,210093),3min;,,,,2001204205;200120822711,,2,,,,3,4,22.1722();WP850D(,850W);RE252AA()N2:99.99%;4,14,582.2,N2,35s,Na2HPO42,,4;NOx4Caldwell5:,,1L/minNa2HPO42,33.115253.2,(1),NOx850W3.3N2N2;NOx,NOx,NOx(2)120mL/min3020023(FENXIHUAXUE)ChineseJournalofAnalyticalChemistry32862881(a)(b)Fig.1Influenceofmicrowavepoweronthedetectionof(a)nitrogenoxideand(b)N2nitrosaminesincigarettesample2(a)(b)Fig.2Influenceofcarriergasflowrateonthedetectionof(a)nitrogenoxideand(b)N2nitrosaminesincigarettesample3(a)(b)Fig.3Influenceofmicrowaveradiationtimeonthedetectionof(a)nitrogenoxideand(b)N2nitrosaminesincigarettesample(thepowerofmicrowaveradiationis850W)3.435s(3146nmol/g)210s(3.74nmol/g)7%;NOx(3),210sNOx210s3.52NOx4,5%(1)2,;,,3min,1Table1AnalyticalresultsoftobaccosandreproducibilityofthemethodNo.Microwaveradiationtime(s)Amountofsample(g)AmountofN2nitrosamines(nmol/g)Deviation(%)NOxAmountofNOx(nmol/g)Deviation(%)17012.83.30-2.0713.442.9127012.83.32-1.4813.02-0.3137012.83.514.1513.352.2247012.83.35-0.5912.46-4.59Averagevalue--3.37-13.06-(note):850W,70s(microwaveradiationpower850W,radiationtime70s)7823:2Table2ComparisonofthedeterminationresultsofN2nitrosaminesbetweenthemicrowaveradiationandside2streammethodSample12345678type3FFFFMMMMTar(mg/cig)1717111512121211Nicotine(mg/cig)1.21.11.01.21.21.00.91.0AmountofN2nitrosamines(nmol/cig)Tobacco334.244.882.572.813.203.003.962.62Sidestream3.634.573.043.383.123.604.082.963FM(Fmeansflue2curedtobaccowhileMmeansblendedtype);332(detectedbyuseofmicrowaveradiationandspectrophotometricmethod)References1ZhuJH,ShenB,WangY,YanD.Chin.Sci.Bull.,2001,46(9):7057072LeafCD,WishnokJS,TannenbaumSR.Carcinogenesis(London).1991,12:5375393HuangJiareng().HandbookofTobaccoIndustry().Beijing():ChinaLightIndustryPress(),1998:7878094ZhuJH,YanD,XiaJR,MaLL,YanD.Chemosphere,2001,44(5):9499565CaldwellW,ConnerJM.J.Assoc.Off.Anal.Chem.,1990,73:783789AMicrowaveRadiationMethodfortheSeparationofN2NitrosaminesandNitrogenOxidesfromTobaccosXuYang,ZhuJianhua3,YunZhiyu(DepartmentofChemistry,NanjingUniversity,Nanjing210093)AbstractBasedontheexperimentalresultthatmanyN2nitrosaminescouldbeevaporatedundermicrowaveradiationsimilartothosenitrogenoxides,anewmethodofmicrowaveradiationfortheseparationofN2nitrosaminesandnitrogenoxidesfromtobaccoandtobaccoproductswereproposed.Theoptimumconditionwasexamined.Inthetimelessthan3minutesbothN2nitrosaminesandnitrogenoxidesintobaccoandtobaccoproductscouldbecollectedforthespectrophotometricdetermination.ThelinearrangeofN2nitrosaminesinthismethodwas1.360mol/L.KeywordsMicrowave,spectrophotometry,N2nitrosamines,nitrogenoxides,tobacco(Received5April2001;accepted27August2001)88230