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 densityI have been asked this question in quiz.The question is from Gas Chromatography topic in portion Chromatography of Analytical Instrumentation

Which of the following is the disadvantage of helium, which can be use

1.	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 densityI have been asked this question in quiz.The question is from Gas Chromatography topic in portion Chromatography of Analytical Instrumentation
Answer» The CORRECT answer is (B) Expensive The explanation is: Helium is expensive. Its ADVANTAGES are that it has low density and it ALLOWS greater flow rates.

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