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[单选题]
红霉素在 pH 9.8 时的分配系数(醋酸丁酯/水)为 44.5,若用等体积的醋酸丁酯进行单级萃取,则理论收率为()
A.97.8%
B.99.32%
C.96.5%
D.95.9%
查看答案
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A.97.8%
B.99.32%
C.96.5%
D.95.9%
A.4.7
B.8.7
C.9.8
D.10.7
A.解离度增高,重吸收减少,排泄加快
B.解离度增高,重吸收减少,排泄减慢
C.解离度增高,重吸收增多,排泄加快
D.解离度降低,重吸收增多,排泄减慢
A.αY(H)值随着pH增大而增大
B.在pH低时αY(H)值约等于零
C.lgαY(H)值随着pH减小而增大
D.在pH高时lgαY(H)值约等于1
E.在pH低时αY(H)值约等于1