The gas–liquid chromatogram for a mixture of organic compounds is shown below.

a. Give the correct labels for a, B and C.

b. What percentage of the mixture is pentan-1-ol?

c. Give an explanation for the different retention times.

d. i. How would the chromatogram change if the liquid in the stationary phase was much more polar?

ii. Explain your answer.

e. Why is gas–liquid chromatography useful in testing for anabolic steroids in the blood of athletes?

f. Explain why the use of gas–liquid chromatography linked to a mass spectrometer is so useful.

g. Why is it difficult to separate dyes using gas–liquid chromatography?

Transcribed Image Text:

90 pentane 80 70 octane 60 pentan-1-ol 50 40 A 30 20 10 - B 0 1 2 3 45 6 7 8 9 10 11 12 13 14 15