Question: what is eluent in tlc?
Answer: Eluent - As Zhe noted "Eluent is a fancy name for solvent in chromatography." It can be a gas or a liquid. For TLC or HPLC a liquid is used. For GC a gas is used. Normal phase TLC - For normal phase TLC the stationary phase is polar and the mobile phase is typically non-polar or only moderately polar.