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traveled by the mobile phase.In normal-phase TLC, the stationary phase is polar. Silica gel is very common in normal-phase TLC. More polar compounds in a sample mixture interact more strongly with the polar stationary phase. As a result, more-polar compounds move less (resulting in smaller R_F) while less-polar compounds move higher up the plate (higher R_F). A more-polar mobile phase dissolves polar compounds more. As such, all

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