图1 浓缩方式对化合物回收率的影响(n=2)

Fig. 1 Effect of the concentration method on the recoveries of the compounds (n=2) Nos. are the same as those in Table 1.

图2 洗脱剂对化合物回收率的影响(n=2)

Fig. 2 Effect of the elution solvents on the recoveries of the compounds (n=2) HEX : ACT: volume ratio of n-hexane to acetone. Nos. are the same as those in Table 1.