试题详情
- 单项选择题pH梯度萃取法分离黄酮苷元类，加碱液萃取的顺序应是
A、NaHCO
→NaOH→Na
COB、NaHCO
→NaCO→NaOHC、NaOH→NaHCO
→NaCOD、NaOH→Na
CO→NaHCOE、Na
CO→NaHCO→NaOH
- B
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热门试题
A、NaHCO→NaOH→NaCO
B、NaHCO→NaCO→NaOH
C、NaOH→NaHCO→NaCO
D、NaOH→NaCO→NaHCO
E、NaCO→NaHCO→NaOH
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