Gas Chromatography

A retention gap is placed between the injector and the front of the column to

A:

retain contaminants and prevent them from reaching the column

B:

retain the sample and release it gradually to the column

C:

prevent backflush of the injected solution

D:

all of the above

Answer: A

No answer description is available. Let's discuss.

📖

In column switching chromatography

A:

compounds trapped on one column are eluted to another column

B:

one column is removed and replaced by another

C:

the flow to the column is switched on and off repeatedly

D:

any of the above

Answer: A

No answer description is available. Let's discuss.

📖

Which of the statements is correct?

A:

Gas chromatography is used to analyse gases

B:

Gas chromatography is used to analyse solids

C:

Gas chromatography is used to analyse gases, solutions and solids

D:

All of the above

Answer: D

No answer description is available. Let's discuss.

📖

Derivatisation of a sample is carried out to

A:

reduce polarity of the analytes

B:

increase the detector response

C:

increase volatility of the analytes

D:

all of the above

Answer: D

No answer description is available. Let's discuss.

📖

Resolution is proportional to the

A:

number of theoretical plates in a column

B:

square root of the number of theoretical plates in a column

C:

square of the number of theoretical plates in a column

D:

cube root of the number of theoretical plates in a column

Answer: B

No answer description is available. Let's discuss.

📖

Questions for: Gas Chromatography