
Concept explainers
(a)
Interpretation:
The plate number has to be calculated for the two peaks given in the chromatogram.
(a)

Explanation of Solution
For L-enantiomer:
Retention time (
Half-width is given as
The relation between plate number, retention time and half-width is given as,
Plate number can be calculated as shown below,
The plate number is calculated as 1561 for L-enantiomer.
For D-enantiomer:
Retention time (
Half-width is given as
The relation between plate number, retention time and half-width is given as,
Plate number can be calculated as shown below,
The plate number is calculated as 1304 for D-enantiomer.
(b)
Interpretation:
The resolution has to be calculated for the two peaks given in the chromatogram.
(b)

Explanation of Solution
Retention time (
Retention time (
Half-width for L-enantiomer is given as
Half-width for D-enantiomer is given as
The resolution can be calculated using the formula as given below,
(c)
Interpretation:
The resolution has to be predicted for the average plate number in the chromatogram.
(c)

Explanation of Solution
Retention time (
Retention time (
The average plate number for the D-enantiomer and L-enantiomer can be calculated as shown below,
Retention factor can be calculated as shown below,
Relative retention is calculated as shown below,
The resolution can be calculated using the formula as given below,
Where,
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