a water flow rate 如何理解? 查了sodium pentosan polysulfate分子量4000-5000。(pentosan polysulfate (pps, syn sp54, tavron, and elmiron) is a sulphated, semi synthetic polysaccharide obtained from beechwood (fagus sylvatica) bark shavings comprising a mixture of macromolecules. pps is hygroscopic, soluble in water to 50% and has a molecular weight of 4000-5000 dalton. it consists of different sized polymers with the major population composed of 12-16 subunits.) 也就是说通过透析是去除小分子无机盐,然后通过超滤(最大透过的分子量范围10000-100000)去除比sodium pentosan polysulfate分子量大的杂质,从而达到筛选的目的。 但是和楼主沟通后,又说最后其实要求选1000mw的膜,不用10000mw的,这样的话就是纳滤了,这一下子就糊涂了,呵呵查看更多