Figure 2-1 
-Refer to Figure 2-1.What do the outer arrows represent in the figure?
Definitions:
Mobile Phase
In chromatography, the solvent that carries the sample through the stationary phase, allowing components to be separated.
Thin Layer Chromatography
An analytical technique used to separate and identify compounds in a mixture by distributing them between a stationary phase and a mobile phase.
Solid Coating
A layer of solid material applied to a surface for protection, decoration, or functional purposes.
Liquid
A state of matter that is fluid, conforms to the shape of its container, and retains a (nearly) constant volume independent of pressure.
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