Quadrupole mass filter with unbalanced r.f. voltage

Details Quadrupole mass filter with unbalanced r.f. voltage Quadrupole mass filter with unbalanced r.f. voltage

H - Electricity

01

J

328/177, 358/9

H01J 49/42 (2006.01)

Patent

CA 1263152

ABSTRACT An unbalanced radio frequency voltage is supplied between two pairs of conductive rods of a quadrupole mass filter of a mass spectrometer system. Means are provided for d.c. voltage polarity reversal for moni- toring positive and negative ions. The d.c. voltage is derived by rectification of the radio frequency voltage. A-41954

519373

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