A.SephadexG-25 B.SephadexG-50 C.SephadexG-100 D.SephadexG-200
A.陽(yáng)離子交換劑一般是pH值從低到高洗脫 B.陽(yáng)離子交換劑一般是pH值從高到低洗脫 C.陰離子交換劑一般是pH值從低到高 D.以上都不對(duì)
A.2%-5% B.1%-2% C.1%-5% D.3%-7%