acoustic quadripole

active quadripole

analytical quadrupole mass spectrometer

axial quadrupole

circinal quadrupole trap

diople-quadrupole interaction

dipole-quadrupole

dipole-quadrupole effecty

dipole-quadrupole interaction

electric quadrupole

Electric quadrupole line

electric quadrupole moment

electric　quadrupole　radiation

electric quadrupole transition

electric[al] quadrupole moment

electric-quadrupole transition

electron quadrupole E2 transition

electrospray ionization quadrupole ion trap mass s

electrospray ionization quadrupole time of flight mass spectrometry (ESI-QqTOFMS)

Electrospray ionization quadrupole time-of-flight