The Q Trap LC/MS/MS system is a hybrid triple quadrupole linear ion trap (LIT) mass spectrometer. The Q3 region can be operated as either a standard quadrupole mass spectrometer or a linear ion trap mass spectrometer. The unique scan modes of both configurations can be linked to provide more and higher quality data than either instrument alone. For example, a precursor ion scan in Transmission mode can be used as a survey scan in order to target specific ions to be used in an enhanced product ion scan (in LIT mode). Conversion between the two modes of operation is rapid, since it involves only the addition or removal of the resolving DC voltages. Please contact us for complete used/refurbished ABI QTRAP system, warranty and service contract details. (QTRAP 2000/Q-TRAP 2000/2000 QTRAP)