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In which of the following detectors, the carrier gas is excited by a radioactive source and the atoms of carrier gas are excited to a metastable state?

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In which of the following detectors, the carrier gas is excited by a radioactive source and the atoms of carrier gas are excited to a metastable state?

(a) Argon ionisation detector

(b) Thermionic emission detector

(c) Flame ionization detector

(d) Electron capture detector

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Query is from Detection System of Gas Chromatography in division Chromatography of Analytical Instrumentation

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The correct answer is (a) Argon ionisation detector

Explanation: In Argon ionisation detector, the carrier gas is excited by a radioactive source and the atoms of carrier gas are excited to a metastable state. It uses argon as carrier gas.

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