(a) Interpretation: In order to obtain desired resolution of 1.5, the number of plates should be calculated. Concept introduction: The resolution can be calculated as follows: R = ( t R ) B − ( t R ) A ( t R ) B × N 4 4 R × ( t R ) B ( t R ) B − ( t R ) A = N N = [ 4 R × ( t R ) B ( t R ) B − ( t R ) A ] 2 where: N=Number of plates ( t R ) A , ( t R ) B =Retention times of species A and B respectively R=Resolution

BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213
BuyFind

Principles of Instrumental Analysis

7th Edition
Douglas A. Skoog + 2 others
Publisher: Cengage Learning
ISBN: 9781305577213

Solutions

Chapter 26, Problem 26.20QAP
Interpretation Introduction

(a)

Interpretation:

In order to obtain desired resolution of 1.5, the number of plates should be calculated.

Concept introduction:

The resolution can be calculated as follows:

R=(tR)B(tR)A(tR)B×N44R×(tR)B(tR)B(tR)A=NN=[4R×(tR)B(tR)B(tR)A]2where:N=Numberofplates(tR)A,(tR)B=RetentiontimesofspeciesAandBrespectivelyR=Resolution

Interpretation Introduction

(b)

Interpretation:

Height of the column should be calculated.

Concept introduction:

The plate height can be calculated as follows:

H=LNwhere:H=PlateheightL=LengthofcolumnpackingN=Numberofplates

Interpretation Introduction

(c)

Interpretation:

Retention time of the methylcyclohexene should be calculated.

Concept introduction:

Retention time is directly proportional to the resolution. Therefore, following equation can be used.

(tR)1(tR)2=(R)12(R)22

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