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Given below is a diagram of electron capture detector. Identify the unmarked component in the diagram.

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Given below is a diagram of electron capture detector. Identify the unmarked component in the diagram.

(a) Glass shield

(b) Electrode

(c) Quartz shield

(d) Radioactive β- emitter

This question was posed to me in an internship interview.

This is a very interesting question from Detection System of Gas Chromatography topic in division Chromatography of Analytical Instrumentation

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The correct option is (d) Radioactive β- emitter

The explanation is: The unmarked component is Radioactive β- emitter. Nitrogen and hydrogen are the best carrier gases for these detectors.

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