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Posts Tagged ‘NH4+’

The New Exclusive SRI-MS Reagent Ion: NH4+ and Its Benefits

A novel proprietary method of NH4+ production for IONICON customers

In PTR-TOF-MS traditionally H3O+ reagent ions produced from H2O vapor are used. NH4+ reagent ions have been mentioned in literature as being particularly beneficial because of higher sensitivity (less fragmentation) and higher selectivity (higher proton affinity). However, so far toxic and corrosive ammonia was needed for NH4+ production.

We developed a novel method of producing NH4+ solely from H2O vapor and N2 (gas cylinder or filtered air) in the established hollow cathode ion source, without the need of any ammonia, by adjusting the pressure and electric fields in the source (PCT application submitted). That is, the reagent ions can be rapidly switched. (more…)