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In chromatography, Rf is the distance the solute travels divided by the distance the mobile phase travels. For example, in thin layer chromatography, if the spot travels 7 cm, and the mobile phase travels 15 cm, the Rf value for that spot will be 7/15 = 0.47
Sister Little
Wiki User
∙ 15y agoDistance travelled by the centre of the spot / Distance travelled by solvent
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Why sand and MgSO4 added during chromatography?
used ad drying agent ,has lower Rf and used as a filter
Difference Rf values for monosaccarides and disaccharides?
Monosaccarides contain fewer polar covalent glycosidic bonds than polysaccharides and therefore move further up during thin layer chromatography and column chromatography.
A compound has a very high Rf value in a polar solvent what can you say about its molecular structure?
Rf Value - It tells you the affinity that the compound has to the solvent...High Rf = little or no polar groups and low Rf = more polar groups. Question: In TLC (thin-layer chromatography) when the compound has a high Rf the solvent is: a. less polar b. Is more polar Answer: a. less polar
What do the Rf values indicate about the relative solubility of the pigment in the the solvent?
The Rf values do not indicate the solubility of a substance. The Rf value or retardation factor is the ratio of the distance traveled by the center of a pot to the distance traveled by the solvent front in chromatography.
What are the significance of Retention factor values?
Rf Values determine the solubility of a substance with respect to a certain solvent. It also determines the affinity of the solute to the solvent (greater Rf=greater affinity of solute to the solvent)
How is rf factor in chromatography calculated?
It's not.
What is the significance of Rf value in chromatography?
See related link below for a better explanation than mine.. I am not to familiar with Rf values, but I have an idea. Rf values are the ratio between the distance traveled by the spot of the analyte to the distance traveled by the solvent used. This is used in paper chromatography and thin layer chromatography. Rf value will allow you to compare to your unknown substance that you are trying to analyze. I will put a link the both paper and TL chromatography.
How do you measure Rf?
Rf value = distance traveled by a compound/distance traveled by a constant.Source: http://www.chemguide.co.uk/analysis/chromatography/paper.html
What is an rf value used for?
The rf value is shorthand for the retention value of a substance. It is used in chromatography to determine the components of an unknown sample.
How do you work out RF value?
Rf = distance to color/distance to front line
How do you calculate RSD in gas chromatography?
hoe RSD calcuate in gas chromatography
Does Rf means resolution factor in paper chromatography?
Rf is nothing but retardation factor in paper chromatography.Rf= distance spot traveled/distance solvent traveled
What is Rf value?
It is the distance travelled by the sample or analyte divided by distance travelled by the solvent front in chromatography.
What are the variables in a plan and design paper chromatography lab?
responding variable-distance of components( Rf values)
Why sand and MgSO4 added during chromatography?
used ad drying agent ,has lower Rf and used as a filter
What is Rf in chemistry?
Rf=Distance travelled by pigment/ Distance travelled by the solvent.Rf is the distance travelled by a sample or analyte divided by distance travelled by the solvent front in chromatography
What does a small Rf number tell you about the characteristics of the moving molecules along the chromatography paper?
The retention factor is a ratio used in columnar chromatography. A small RF number signifies that the molecule crossed a small distance from the origin of applied pigments.
