Applied Biosystems (AB) and its partner, MDS Sciex, sent Hopfgartner, professor of pharmaceutical analytical chemistry at the University of Geneva, a prototype instrument that combines the attributes ...

Consisting of four parallel metal rods on which a fixed direct-current voltage and alternating radio-frequency voltage are applied, quadrupole mass filters allow users to selectively filter all ions ...

“At low temperatures, models of reactivity must include the effects of the permanent electric dipoles and quadrupole moments ...

Instrument geometry and the positioning of ion mobility separation prior to quadrupole isolation and fragmentation generate clear fragmentation spectra to further enhance certainty of identifications.

Four quadrupoles: •First: Quadrupole Ion Deflector (Q0) directs ions to the entrance of the first mass filter • Second: Transmission Analyzer Quadrupole 1 (Q1, full-sized for <0.7 amu mass resolution) ...

Four quadrupoles: First: Quadrupole Ion Deflector (Q0) guides the ions to the entrance of the initial mass filter Second: Transmission Analyzer Quadrupole 1 (Q1, full-sized for <0.7 amu mass ...

Ion Accounting algorithm; MRM: Multiple reaction monitoring; MS: Mass spectroscopy; PRM: Parallel reaction monitoring; pSRM: Pseudo-SRM; Q-TOF; Quadrupole orthogonal acceleration time-of-flight ...

The intensity of the ion signals is sequentially measured and converted to an elemental concentration via a calibration curve generated with certified standards. The triple quadrupole technology can ...

Replacing the conventional quadrupole isolation step with high-resolution ion mobility separation, this technology enables fragmentation data with up to 10 times higher signal-to-noise ratios and ...