3Paroni R,Fermo I,Molteni L,et al.Lactulose and mannitol intestinal permeability detected by capillary electrophoresis[J].J Chromatogr B:Analyt Technol Biomed Life Sci,2006,834(1-2):183-187.
4Zokaee F,Kaghazchi T,Zare A,et al.Isomerization of lactose to lactulose-study and comparison of three catalytic systems[J].Process Biochem,2002,37(6):629-635.