Δ肖凯军,李琳,郭祀远,陈健,蔡妙颜(, 510640) :研究了90V/cm电场强度下截留相对分子质量为10000的PAN膜错流超滤分离粘多糖的分子截留特性,采用凝胶过滤色谱法测定超滤透过液中粘多糖相对分子质量分布,并利用琼脂糖凝胶电泳法分析超滤分离粘多糖组分和负电性。研究结果表明:在电场作用下,超滤透过液中粘多糖相对分子质量由1700Da增加到22000Da,并能够显著地增加带负电性的酸性粘多糖的膜截留率,选择性地透过中性粘多糖分子。:电场;粘多糖;超滤;分子截留:R917 :A :1002-3461-(2001)04-0007-04MolecularRetentionofUltrafiltrationMembraneforMu-copolysaccharidesinthePresenceofanElectricFieldXIAOKai-jun,LILin,GUOSi-yuan,CHENJian,CAIMiao-yan(LightIndustryandChemicalEngineeringResearchInstitute,SouthChinaUniversityofTechnology,Guangzhou510640)Abstract:ThemolecularretentioncharacteristicformucopolysaccharidesthroughPANultra-filtrationmembranewithamolecularcut-offof10000Daunderanelectricfieldof90V/cmelectricstrengthwereinvestigated.Themucopolysaccharidesmolecularinthepermeationso-lutionwasmeasuredbygelfiltrationchromatogaphyandthenegativelychargedpropertiesofmucopolysaccharideswereanalyzedbyalgagelelectrophoresis.Theseresultsdemonstratedthatanelectricfieldcanincreasethemolecularweightdistributionsofmucopolysaccharidesinthepermeatefrom1700Dato22000Daandtheretentionofmembraneforacidmu-copolysaccharideswithstrongernegativecharges,andthereforetheneutralmucopolysac-charidsselectiveltransportthroughultrafiltrationmembrane.Keywords:electricfield;mucopolysacchrides;ultrafiltration;molecularretention(Proteogly-can)。。、、、、、、。,[1~4]。,,[5]。,7《》20014(82)Δ(:20000608)、([1999]284)(:2000056117),,。、[3],、[7]。(、),,[3]。,。,,、。1 1.1 实验材料(PAN)10000,10000Da,;:;:Sigma;:Sera;55000Da、23000Da、12600Da、7100Da、1470Da:Waters;,AR。1.2 实验设备和仪器244(WATERS),721-100(),BP200(Sartorius),—()。1.3 超滤实验流程1,,,。,,,,。1.4 实验方法1.4.1 ,[8]。1-超滤膜组件 2-蠕动泵 3-流量计 4-压力表5-超级恒温器 6-贮液槽 7-直流电源 8-搅拌浆 9-阀门 10-透过液贮槽1 1.4.2 (R),:R=(1-Cp/Cb)×100%(2),R—,%;Cp—,g·L-1;Cb—,g·L-11.4.3 [3]244Ul-trohydrogel250。410,0.1MNaCl,30℃,0.6mL·min-1,10μL。1.4.4 0.8%,100V[8]。2 2.1 粘多糖相对分子质量的分布,,。HPLC,2。2,3(21),11.54min、15.53min18.45min,(MW)(t)Ln=17.842-0.6639t(R2=0.9971),26000Da、1800Da8《》20014(82)2 1470Da。10000Da。,、、、。,PAN10000,1%、0.12MPa、30℃,550mL·min-1E=90V·cm-1。2.2 电场作用下超滤膜的截留率,,,。3 3,,,,30min,95%。,-,。2.3 电场对膜截留相对分子质量的影响4 (E=90V/cm,1%粘多糖,0.12MPa,30℃,550mL·min-1)5 ,。E=0V/cmE=90V/cm,45。4,,12,1700Da1470Da。(2)26000Da,PAN9《》20014(82)1000026000Da,1700Da。,,PAN100001700Da。5。,2(12),2,122000Da。E=90V/cm22000Da,1700。:,,,;,,。2.4 超滤液的琼脂糖电泳分析6。6,E=0V/cm4,,E=9V/cm4(5),522000,,22000。,,,,,。,,,,,,。(1:硫酸软骨素标准品;2和3分别是E=0V/cm时浓缩4倍的浓缩液和透过液;4和5分别是E=9V/cm时浓缩4倍的浓缩液和透过液;6:1%粗粘多糖液)6 3 ,;,;,,、。[1] WaardPd,JohannesFGV,TadashiHarada,etal.StructuralStudiesonSulfatedOligosaccharidesDerivedfromtheCarbohydrate-ProteinLinkageRegionofChon-droitin6-SulfateProteoglycansofSharkcartilage[J].Jour-nalofBiologicalChemistry,1992,26(9):6036.[2] ,,,.[J].,1999,(2):57.[3] .[D].,1999(5)15.[4] ,,,.[J].,1992,44(4):17.[5] .[J].,1996,22(5):286.[6] .[J].,1998,24(2):92.[7] ,,,.[J].,1996,5:66.[8] .[M].:,1988,259.(收稿日期:2001-02-14)10《》20014(82)