硝酸乙醇法测定纤维素含量

[e-mail]王林风,程远超(,473000):2011-05-26.:(863)(2008AA10Z338-02).:(1967-),,,.Email:[e-mail].:,..:15s,4,40~60,G2.3s,3,40~60,G3.:;;;;:TQ353.4:A:1008-1011(2011)04-0052-04DeterminationthecontentofcellulosebynitricacidethanolmethodWANGLinfeng,CHENGYuanchao(StateKeyLaboratoryofMotorVehicleBiofuelTechnology,HenanTianguanGroupCo.,Ltd.,Nanyang473000,Henan,China)Abstract:Thecontentsofcelluloseofcornstalk,wheatstraw,ricestrawandthepretreatedsampleofstrawshavebeenresearchedbynitricacidethanolmethodologyaccordingtothecharacteristicsofstrawsbiofuelethanol.Fourparametersasthedurationofcomminutingsample,thetimesoftreatingsamplebynitricacidethanolliquidmixture,theparticlesizeofsampleandtheapertureoftundishforsuckingfiltrationhavebeenoptimized.Theoptimizedpevrameters:forstrawsample,comminut15s,treatbynitricacidethanolliquidmixture4times,sampleaperture40-60mesh,useG2glasssandcoretundish.forpretreatedsample,comminut3s,treatbynitricacidethanolliquidmixture3times,sampleaperture40-60mesh,useG3glasssandcoretundish.Keywords:strawbiofuelethanol;thecontentsofcellulose;nitricacidethanolmeasure;particlesize;aperture,10%,[1].,,[2],,.,.,,[3].,.4:53,.,,[4].,.,,.,.11.1:.:.1.21.2.1样品预处理1cm,10510h,..1.2.2硝酸乙醇混合液的配制,400mL1000mL,10100mL,,,,,.1.2.3纤维素含量测定(w);G4500;1.00~1.05g(m0),250mL,25mL,,1h,G4,,.10mL,,,,,105,(m1),500[5](m2).C=m1-m2m0(1-w)100%22.110.0g,().,[6],.2040608010020,100,.12.,20100,100.1Table1Thedistributionofstrawparticlesizecomminutedwithdifferenttimeg10s15s20s2020~4040~6060~8080~1001004.31.60.91.11.40.73.71.31.11.30.62.04.42.10.71.20.31.32.10.92.71.50.62.21.91.11.90.91.13.12.40.71.61.70.33.31.80.92.22.60.12.41.70.71.71.90.73.31.91.41.12.30.43.92.2,,;,,542011()[7],,.2Table2Thedistributionofpretreatedstrawsamplesparticlesizeaftercomminutingg3s5s10s2020~4040~6060~8080~1001001.01.92.71.00.23.20.91.62.41.30.13.71.21.92.80.90.52.70.61.81.90.60.94.20.51.61.30.70.15.80.81.81.81.11.03.50.31.41.10.30.96.00.11.10.60.20.26.80.41.41.00.50.76.0,;,..20~4040~6060~8080~100,3~5[2].34.,.12,40~60(0.4%),(1%).34,40~60433.43%,540.14%.40~60430.45%,540.26%,.3Table3Themassfractionofcelluloseinstraws%20~4040~6060~8080~10034534534541.1340.1840.1143.7942.9442.8538.2437.1136.9840.9738.6338.6043.2142.7342.6637.7936.4836.4140.1238.1438.1043.0042.1742.0337.4136.3336.2540.0138.1538.0943.0741.9541.9337.3636.4136.3040.5638.7838.7343.2742.4542.3737.7036.5836.494Table3Themassfractionofcelluloseinpretreatedstrawsamples%20~4040~6060~8080~10034534534542.5842.4442.3943.3643.2843.2739.2439.1739.2042.2942.3142.3343.1143.0843.0139.0638.9939.0642.2342.0942.0142.7842.7742.4738.7138.6838.7242.0342.0141.9642.4642.6742.1838.6938.5338.5842.2842.2142.1742.9342.9542.7338.9338.8438.8940~60.4.,[8],[9-10],4:553.1Fig.1Theaverageerrorofcellulosecontentindifferentparticlesizeofthreekindsstraw2Fig.2Theaverageerrorofcellulosecontentindifferentparticlesizeofthreekindspretreatedstraw2.3[11],,,,[12],,.,.5,.G2G30.25%,G3G40.01%,,.G2G36.42%,;G3G40.32%,,.,G2,G3.5Table5ThecellulosecontentandsuckingfiltrationtimebydifferenttundishG2(10~15m)/(%)/(h)G3(4.5~9m)/(%)/(h)G4(3~4m)/(%)/(h)38.6142.3836.3739.3040.2536.540.50.50.50.50.50.538.7242.4936.4442.0842.9639.021.51.51.52.02.02.038.6642.5136.4942.2343.1639.072.02.02.04.04.04.03,:15s,4,40~60,G2.,:3s,3,40~60,G3.,.,,,.,,,,.;,.(下转第71页)4:/71[3]GABRIELAN,REINERDO,LABUKASDA.LipophilicityofsomeGABAergicphenolsandrelatedcompoundsdeterminedbyHPLCandpartitioncoefficientsindifferentsystems[J].JPharmBiomAnal,2009(49):686-691.[4]徐煜,吴家全,衣守志.[J].,2010,33(7):111-114.[5]李小林,荆国华,周作明,等./QSPR[J].,2010,27(4):528-532.[6]DAIYong,JIANGJianLin,WANGZunYao,etal.ExperimentalandQSPRstudiesonnoctanol/waterpartitioncoefficient(lgKow)ofsubstitutedaniline[J].StructChem,2007,26(12):1449-1454.[7]PADMANABHANJ,PARTHASARATHIR,SUBRAMANIANV,etal.QSPRmodelsforpolychlorinatedbiphenyls:noctanol/waterpartitioncoefficient[J].BioorgMedChem,2006(14):1021-1028.[8]LIUTianBao,PENGYanFen,LIUSiYun.QSPRstudyonoctanolwaterpartitioncoefficient(lgKow)ofaliphaticamine[J].CompApplChem,2009,26(6):267-269.[9]张幸川,杨郭英,王尊尧,等.(PCDD/Fs)/[J].,2007,27(2):257-266.[10]韩香云,王遵尧,杨春生,等.[J].,2005,25(6):840-844.[11]ZHANGXingChuan,YUJing,WANGZunYao,etal.QSPRstudiesonlgKowandlgKocoffluorobenzenesandpropertyparametersbasedonHFandDFTcalculations[J].StructChem,2006,25(7):823-829.[12]XIEYaJie,ZHAOHuiMing,WANGZunYao,etal.DFTandpositionofClsubstitution(PCS)methodsstudiesonnoctanol/waterpartitioncoefficients(lgKow)andaqueoussolubility(lgSw)ofallPCDDcongeners[J].StructChem,2007,26(12):1409-1418.(上接第55页):[1]钱叶剑,谈建,左承基,等.[J].,2006,24(4):320-325.[2]谭满志,郭英男,刘金山,等.[J].:,2005,35(1):24-28.[3]崔红梅.:[D].,2010.[4]李与文,王慧丽.[M].:,2005:19-22[5]薛惠琴,杭怡琼,陈谊.[J].,2001(2):15-17.[6]GROUSWR,CONVERSEAO,GRETHLEINHE.Effectofsteamexplosionpretreatmentonporesizeandenzymatichydrolysisofpoplar[J].EnzymeMicrobialTechnol,1985(8):274-280.[7]王镜岩,朱圣庚,徐长法.:[M].:,2002:20.[8]罗鹏,刘忠.[J].,2005,134(8):42-47.[9]TANAHASHIM,TAMABUCHIK,GOTOT,etal.Characterizationofsteamexplodedwoodchemicalchangesofwoodcomponentsbysteamexplosion[J].WoodRes,1998