Question

A stripper column used in gas chromatography, can be used to retain which of the following when an air sample is passed through it?

(a) CO

(b) Methane

(c) Light hydrocarbons

(d) Heavy hydrocarbons

I got this question during an interview.

This interesting question is from Estimation of Carbon Monoxide in section Pollution Monitoring Instruments of Analytical Instrumentation

Answer 1

The correct answer is (d) Heavy hydrocarbons

To explain I would say: A stripper column can be used to retain heavy hydrocarbons when an air sample is passed through it. It passes CO and methane into the column.