Chapter 26, Problem 26.18QAP

Interpretation Introduction

(a)

Interpretation:

Average number of plates should be calculated.

Concept introduction:

Number of theoretical plates is given by following equation:

$\text{N = 16}{\left(\frac{{\text{t}}_{\text{R}}}{\text{W}}\right)}^{\text{2}}$

N = number of plates

t_R = retention time

W = width of peak base

Average = $\frac{N_A+N_B+N_C+N_D}{4}$

Interpretation Introduction

(b)

Interpretation:

Standard deviation for the N should be calculated.

Concept introduction:

Standard deviation will give how the values deviate from mean value of N.

Interpretation Introduction

(c)

Interpretation:

Average plate height of column should be calculated.

Concept introduction:

$\text{N=}\frac{\text{L}}{\text{H}}$

N = plate count

L = length of the packing (cm)

H = height of the column