Discussion
Which of the following is not a detector for Gas Chromatography ?
Answer: B
Electrospray is not a detector for gas chromatography.
Electrospray ionisation is a method of producing ions from a liquid, used to couple liquid chromatography to a mass spectrometer. It needs a liquid stream, so it has no place in GC, where the sample is a gas.
The electron capture detector (sensitive to halogenated compounds), the thermal conductivity detector (universal) and the flame ionisation detector (for organic compounds) are all standard GC detectors.
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