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Answer :
The Flame Ionization Detector (FID) is the device that detects through a difference in filament or bead heat by measuring the current created when organic compounds are combusted. Hence the correct option is - C) Flame ionization detector
The detection device that detects through a difference in filament or bead heat is the Flame Ionization Detector (FID). In a Flame Ionization Detector, organic compounds are combusted in a hydrogen/air flame, resulting in a flame containing electrons and organic cations, such as CHO*. Applying a potential across the flame creates a current, which can be measured and is proportional to the concentration of cations in the flame. This principle allows the FID to detect various organic compounds, and it is known for its high sensitivity particularly to hydrocarbons.
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