Triple-stage quadrupole instruments

Hsu, F.-F., and Turk, 1 1999. Structural Characterization of triacylglycerols as lithiated adducts by electrospray ionization mass spectrometry using low-energy collisionally activated dissociation on a triple stage quadrupole instrument. J. Am. Soc. Mass Spectrom., 10, 587-599. 

Hsu F-F, Turk J. Distinction among isomeric unsaturated fatty acids as lithium adducts by ESI-MS using low energy CID on a triple stage quadrupole instrument. J Am Soc Mass Spectrom. 1999 10 600-12. 

---