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Which of the following methods make use of pyrolysis while used for detecting methane?

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Which of the following methods make use of pyrolysis while used for detecting methane?

(a) Mass spectroscopy

(b) Flame ionization detector

(c) Ultraviolet absorption

(d) Gas chromatography

I got this question by my college director while I was bunking the class.

My question comes from Estimation of Hydrocarbons topic in section Pollution Monitoring Instruments of Analytical Instrumentation

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The correct answer is (b) Flame ionization detector

Explanation: Flame ionization detector makes use of pyrolysis while used for detecting methane. It is used to detect organic compounds.

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