TLC中的比移值一般表示为
A: K
B: k
C: Rf
D: tR
E: R
A: K
B: k
C: Rf
D: tR
E: R
举一反三
- TLC中的主要参数是()。 A: tR B: W C: Rf D: h E: A
- Which of the following is correct for TLC using silica gel as absorbent? A: Higher the absorption activity of absorbent. larger k and smaller Rf B: Higher the absorption activity of absorbent. larger k and larger Rf C: Stronger the polarity of solvent. larger k and smaller Rf D: Weaker the polarity of solvent. larger k an d larger Rf
- Which one is correct for description of TLC using silica gel as absorbent? A: Higher the absorption activity of absorbent. larger k and smaller Rf B: Higher the absorption activity of absorbent. larger k and larger Rf C: Stronger the polarity of solvent. larger k and smaller Rf D: Stronger the polarity of solvent. larger k and larger Rf
- CRH2型动车组设备代号中,时间继电器用表示（） A: R B: TR C: K D: N
- 在极性溶剂中:1分() A: K带<br/>蓝移,R带蓝移 B: K带<br/>红移,R带<br/>红移 C: K带<br/>蓝移,R带<br/>红移 D: K带<br/>红移,R带<br/>蓝移