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Measure the distance from your marked pencil line to the solvent front. Also measure the distance fomr the marked pencil line to the middle of the spot, and divide this by the first distance. This value will be between 0 and 1.
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∙ 15y ago
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∙ 12y agoRF value is the distance travelled by a component of a mixture relative to the solvent. That is, it is the distance travelled by the component divided by the distance travelled by the solvent.
RF value for any component has a fixed value less than unity. By calculating RF value for a component and comparing it with known values, a given component can be identified.
Wiki User
∙ 12y agowell the proper way to solve this is Rf=distance by traveled pigment divided by distant traveled by solvent
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∙ 15y agoRf=distance of pigment band/distance of solvent front x 100%
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∙ 12y agothe factors which can affect thin layer chromatography are:
polarity and pH of the solvent and the temperature under which it is conducted
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∙ 9y ago1
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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.
What is Rf value?
It is the distance travelled by the sample or analyte divided by distance travelled by the solvent front in chromatography.
How is rf factor in chromatography calculated?
It's not.
What will happen if there is an overrun of solvent in paper chromatography?
The Rf value cannot be determined since the distance of the solvent may overlay in the paper.
Would RF values of amino acid you use in paper chromatography be the same if you use another solvent system?
Rf value is the ratio of distanced covered by solute by distanced covered by solvent.
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 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 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.
What is Rf value?
It is the distance travelled by the sample or analyte divided by distance travelled by the solvent front in chromatography.
How do you calculate Rf in chromatography?
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
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.
Define the Rf value?
RF value (in chromatography) The distance travelled by a given component divided by the distance travelled by the solvent front
How is rf factor in chromatography calculated?
It's not.
What will happen if there is an overrun of solvent in paper chromatography?
The Rf value cannot be determined since the distance of the solvent may overlay in the paper.
Would RF values of amino acid you use in paper chromatography be the same if you use another solvent system?
Rf value is the ratio of distanced covered by solute by distanced covered by solvent.
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
