Patent ID: 7667197

Claim:
A mass analyzing apparatus, comprising: a first metal electrode plate, having a plurality of first through-holes; a second metal electrode plate, having a plurality of second through-holes, wherein the second metal electrode plate is grounded, and there is a gap between the second metal electrode plate and the first metal electrode plate so as to form a face discharge room, the first through-holes communicate with the face discharge room, and the second through-holes communicate with the face discharge room; an RF power supply, electrically connected to the first metal electrode plate, to cause electric face discharge in the face discharge room between the first metal electrode plate and the second metal electrode plate; a reactant gas, passing through the first metal electrode plate and the second metal electrode plate to become a dissociation plasma by a face discharging process in the face discharge room; and a mass spectrometer for a mass analysis after the plasma reacts with a gas analyte from a sample and then enters the mass spectrometer.