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How do you work out RF value?
Rf = distance to color/distance to front line
What does an Rf value indicate?
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.
Why does carotene have the highest Rf value?
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.
What does it mean when the Rf value is less then 0?
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.
Rf value of beta-carotene?
college bio lab. we got 1, using beta carotene as the front. its traveled 10.8cm
What is the maximum and RF value can be?
The maximum RF value that can be obtained is 1.0. This means that the substance travels the full distance of the chromatography medium being used. Any RF value greater than 1 is not physically possible.
What is the rf value of cocaine?
Rf is about .45
What is the Rf value of salicylamide?
It will depend on the solvent system you are using.
What is rf value and how is determine?
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
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 does saturation effect RF value?
In general, as saturation increases, the RF value decreases. This is because an increase in saturation tends to increase retention of the compound on the stationary phase, resulting in a lower RF value. Conversely, lower saturation levels may allow the compound to move more freely, leading to a higher RF value.
What is the RF value for red ink blue ink and green ink?
the Rf value value is 8.44 as the particles are lighter than the solvent
What is the relationship between chain length and Rf value?
As a general rule the longer the carbon chain the greater the Rf value.
What is rf value of eugenol?
The Rf value of eugenol is around 0.61-0.63, when using a suitable solvent system like ethyl acetate:benzene (7:3).
What is the RF value for aspirin using TLC?
The RF (retention factor) value for aspirin on a TLC plate is typically around 0.4-0.5. This value is calculated by dividing the distance traveled by the compound by the distance traveled by the solvent front. It is a useful parameter for identifying and characterizing compounds on a TLC plate.
What is the Rf value of phenacetin?
about 0.342
What do the Rf values indicate about the relative solubility of the pigment in the the solvent?
The Rf value indicates the ratio of the distance a pigment travels compared to the distance the solvent travels on a chromatography plate. The higher the Rf value, the more soluble the pigment is in the solvent used for the chromatography.
