How to calculate selectivity

Selectivity (%)= mol desired product / (mol starting compound-mol starting compound left after reaction)*100.

1. What is selectivity calculation?
2. How do you calculate selectivity and conversion?
3. How do you calculate column selectivity?
4. What is selectivity in chemical reaction?

What is selectivity calculation?

Selectivity is the ability of an HPLC method to separate two analytes from each other. Selectivity usually is abbreviated with the Greek letter α, and is calculated as: α = k₂ / k₁ where k₁ and k₂ are the retention factors, k, of the first and second peaks of a peak pair.

How do you calculate selectivity and conversion?

So the selectivity may be defined as the conversion of the reactant to the desirable product divided by the overall conversion of the reactant. It may also be stated as the rate of conversion of the feed to the desired product divided by the overall conversion rate of the feed.

How do you calculate column selectivity?

It is generally calculated by k' = (tR - tM)/tM = tR'/tM. g) The selectivity factor (α) of a column for two analytes (A eluting before B) is given by α = KB/KA = k'(B)/k'(A) = tR'(B)/tR'(A).

What is selectivity in chemical reaction?

The selectivity (ap) is the ratio of the amount of a desired product P obtained and the amount of a key reactant converted.