An Ion Source for the HVEE 14C Isotope Ratio Mass Spectrometer for Biomedical Applications

MEMS ion source for mass spectrometer integrated on a chip

Tuning of an electrospray ionization source for maximum peptide-ion transmission into a mass spectrometer.

We describe assembly and optimization of a continuous flow nanoelectrospray source for high-performance analysis on a routine basis. It is derived from an inJection adaptable Fine Ionization Source ("JaFIS"), previously shown to be durable and easy to use (Geromanos, S.; et al. Rapid Commun. Mass Spectrom. 1998, 12, 551-556) and now modified for maximum sensitivity. Proper design, manufacturing...

Examination of the best pressure range for ion/molecule reactions of anthraquinones in an external source ion trap mass spectrometer.

This study outlines some observations of the pressure effect for gas phase ion-molecule reactions of anthraquinone derivatives with dimethyl ether in an external source ion trap mass spectrometer. At the reagent pressure of 7.998 x 10(-2) Pa, formation of the protonated ions, [M + 13]+, [M + 15]+, and [M + 45]+ ions, of anthraquinones can be observed. However, at the pressure of 1.066 x 10(-2) ...

An electrostatic autoresonant ion trap mass spectrometer.

A new method for ion extraction from an anharmonic electrostatic trap is introduced. Anharmonicity is a common feature of electrostatic traps which can be used for small scale spatial confinement of ions, and this feature is also necessary for autoresonant ion extraction. With the aid of ion trajectory simulations, novel autoresonant trap mass spectrometers (ART-MSs) have been designed based on...

b isotope ratio measurements using two Daly detectors equipped on an ICP - mass spectrometer

The simultaneous detection of Pb and Pb ions has been made by multiple-ion counting ICP-mass spectrometry using two Daly detectors (MC-ICPMS). To evaluate the long-term gain stability of the detectors, Ba/Ba and Ba/Ba ratios have been measured by a combination of Daly and Faraday detectors (Ba(D)/Ba(F)) and an electron multiplier and Faraday detectors (Ba(EM)/Ba(F)). The measured Ba(EM)/Ba(F) r...