Chapter 24, Problem 24.6P

a)

Interpretation Introduction

Interpretation:

The characteristics of an ideal carrier gas has to be given.

Concept Introduction:

The mobile phase is used as carrier gas in gas chromatography that is generally a rare gas like Helium, or non-reactive gas such as Nitrogen. The most commonly used carrier gas is Helium in $\text{90\%}$ of instruments though Hydrogen is used as preferred for improved separations.

To give the characteristics of an ideal carrier gas

b)

Interpretation Introduction

Interpretation:

The reason why Hydrogen and Helium allows more rapid linear velocities than Nitrogen in gas chromatography has to be explained.

Concept Introduction:

The mobile phase is used as carrier gas in gas chromatography that is generally a rare gas like Helium, or non-reactive gas such as Nitrogen. The most commonly used carrier gas is Helium in $\text{90\%}$ of instruments though Hydrogen is used as preferred for improved separations.

To explain the reason why Hydrogen and Helium allows more rapid linear velocities than Nitrogen in gas chromatography