Isobaric interferences refer to different elements whose isotopes share a common mass. ... The elements that form the polyatomic interferences usually result from the sample matrix, sample diluent, and argon itself. An example of a polyatomic interference is ArCl⁺ on As⁺ , both of which occur at m/z 75.

How do I get rid of isobaric interference?

The removal of isobaric interferences is possible by leveraging the different reactivity of given elements towards reactive gases such as O2, H2 or NH3. If either the analyte or the interfering ion undergoes a reaction with one of the aforementioned gases, it is possible to measure interference free.

What types of interferences are encountered in atomic mass spectrometry?

What types of interferences are encountered in atomic mass spectrometry? Isobaric interferences are encountered when the isotopes of two elements have the same mass. A second type of spectroscopic interference occurs from molecular species that have the same mass as that of an analyte ion.