Chapter 23, Problem 23.23P

(a)

Interpretation Introduction

Interpretation:

The value of retention factor has to be calculated.

Concept introduction:

Retention factor:

The retention factor $\left(\text{k}\right)$ is given by

$\begin{array}{l}\text{k}\text{=}\frac{{\text{t}}_{\text{r}}\text{-}{\text{t}}_{\text{m}}}{{\text{t}}_{\text{m}}}\\ \text{Where,}\\ \text{k}\text{-}\text{retention}\text{factor}\\ {\text{t}}_{\text{r}}\text{-}\text{time}\text{required}\text{to}\text{elute}\text{the}\text{peak}\\ {\text{t}}_{\text{m}}\text{-}\text{time}\text{required}\text{for}\text{mobile}\text{phase}\text{to}\text{pass}\text{through}\text{the}\text{column}\text{.}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The fraction of time spent by solute in mobile phase has to be calculated.

Concept introduction:

Retention factor:

The retention factor $\left(\text{k}\right)$ is given by

$\begin{array}{l}\text{k}\text{=}\frac{{\text{t}}_{\text{r}}\text{-}{\text{t}}_{\text{m}}}{{\text{t}}_{\text{m}}}\\ \text{Where,}\\ \text{k}\text{-}\text{retention}\text{factor}\\ {\text{t}}_{\text{r}}\text{-}\text{time}\text{required}\text{to}\text{elute}\text{the}\text{peak}\\ {\text{t}}_{\text{m}}\text{-}\text{time}\text{required}\text{for}\text{mobile}\text{phase}\text{to}\text{pass}\text{through}\text{the}\text{column}\text{.}\end{array}$

(c)

Interpretation Introduction

Interpretation:

The value of partition coefficient for the given system has to be calculated.

Concept introduction:

Relation between $kandK$:

Relationship between retention factor and partition coefficient is given by

$\begin{array}{l}\text{K}\text{=}\text{k}\frac{{\text{V}}_{\text{m}}}{{\text{V}}_{\text{s}}}\\ \text{where,}\\ \text{k}\text{-}\text{retention}\text{factor}\\ \text{K}\text{-}\text{partition}\text{coefficient}\\ {\text{V}}_{\text{m}}\text{-}\text{volume}\text{of}\text{mobile}\text{phase}\\ {\text{V}}_{\text{s}}\text{-}\text{volume}\text{of}\text{stationary}\text{phase}\end{array}$