Which of the following is the disadvantage of helium, which can be used as carrier gas in gas chromatography?
A. Dangerous to use
B. Expensive
C. Reduced sensitivity
D. High density
Answer:B
Which of the following is the disadvantage of helium, which can be used as carrier gas in gas chromatography?
A. Dangerous to use B. Expensive C. Reduced sensitivity D. High density
Explanation: Helium is expensive. Its advantages are that it has low density and it allows greater flow rates.