The retention element (rf) of a particular material is the ratio of the street the point out moved over the origin to the distance the solvent former moved over the origin.

Retention factors variety between zero and also one.

You are watching: How to calculate rf values in paper chromatography

Retention components are advantageous in comparing the outcomes of one chromatogram to the results of another.

If the problems in i beg your pardon the chromatogram are run are unchanged the retention aspect for a provided material have to remain constant.

**Formula to calculation retention aspect value.**

**Example:**

A solvent prior traveled because that 0.7cm top top a thin-layer chromatography paper (TLC) if a compound traveled for o.5 cm. Calculation the rf value.

Therefore, the rf value is 0.7.

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