下列关于教材中纸层析法分离Fe2+和Cu2+实验说法正确的是        

下列关于教材中纸层析法分离Fe2+Cu2+实验说法正确的是                                      

       A.滤纸作为惰性支持物,滤纸上吸附的水作为流动相

       B.滤纸上吸附的水作为固定相,丙酮作为流动相

       C.展开剂的成份为蒸馏水与丙酮

       D.点样所用的试剂的浓度应较小,点样时的试剂点斑直径应大于05 cm

答案

B

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