Two samples of reed magnesium lignosulfonate (Mg-LS) , molecular weight cut-off (MWCO) 6000 and 20000 respectively, were isolated from a reed bisulfite spent liquor by ultrafiltration.

• 用超滤法分离了两种荻苇木素磺酸镁(切割分子量分别为6000和20000),并对其中切割分子量为20000的荻苇木素磺酸镁进行了离子交换,得到荻苇木素磺酸钠。