Question

What type of substance is the mobile phase in gas chromatography?

a polar liquid


a nonpolar liquid


a mixture of two liquids to create the correct polarity


a polar gas


an inert gas like nitrogen

my answer is an insert gas like nitrogen

Answer 1

yes

Answer 2

or He.

Answer 3

[AI-generated answer — Explain Bot]

That is correct! In gas chromatography, the mobile phase is an inert gas like nitrogen. The purpose of the mobile phase is to carry the sample through the chromatographic column. Since the analysis is being done in the gas phase, an inert gas is used to avoid chemical reactions with the sample or the column. Nitrogen is commonly used as it is abundant, inert, and does not interfere with the separation process. Well done!