SEARCH Articles Figures Tables Analyzer quadrupole Ion trap Ion trap mass analyzer Ion trapping Ion-quadrupole Mass analyzer Mass analyzer quadrupole Mass analyzers ion-trapping Mass quadrupole Mass trapping Mass-Analyzing Linear Quadrupole Ion Trap with Axial Ejection Quadrupole ion trap Quadrupole ion trap analyzer Quadrupole mass analyze Quadrupole trap Trapped ions Trapping analyzers Trapping quadrupole