Rf = distance to color/distance to front line
Rf value = distance traveled by a compound/distance traveled by a constant.
Source: http://www.chemguide.co.uk/analysis/chromatography/paper.html
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Rf value indicates the relationship of the distance moved by a pigment to the distance moved by a solvent.The Rf can be calculated by the following equation. Rf=distance pigment migrated/distance solvent front migrated.
The Rf value of the xanthophyll is two thirds that of carotene because xanthophyll has an H bond with cellulose, which slows it down, and makes it less soluble in the solvent. Carotene is more soluble in 9:1 petroleum-ether acetone solution, which caused it to be carried higher and have a larger Rf value.
When the Rf value is zero, it generally refers to the position of the substance in the chromatogram. This means it did not move of that origin point.
college bio lab. we got 1, using beta carotene as the front. its traveled 10.8cm
Rf is about .45
It will depend on the solvent system you are using.
The Rf value depends on the type of plate used and solvents.
Saturation affects the RF value in a significant manner. With saturation of the air, this will result into high RF value which cause poor resolution.Ê
Rf value changes with every experiences..... it depends on what was your solvant, the room température, the chromatograph you used..... that's why you wont find Rf tables in organic chemistry books
1, if it completely solube in the solvent, it will travel with it, right to the solvent front.
the mobility of any component in a particular solvent is referred to as its RF value. Mathematically, RF value = distance travelled by solute/ distance travelled by the solvent
anthocyanins rf vlaue is o.95
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.
the Rf value value is 8.44 as the particles are lighter than the solvent
As a general rule the longer the carbon chain the greater the Rf value.
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