Mass-spectrometric evidence for the formation of bromochloramine and N-bromo-N-chloromethylamine in aqueous solution

Membrane introduction mass spectrometry (MIMS) is used to confirm the existence of bromochloramine and N-bromo-N-chloromethylamine in aqueous solution, which have been proposed previously from UV-visible spectra. Bromochloramine is detected by mass spectrometry and UV-visible spectroscopy as a product of monochloramine reactions with bromide ion and with hypobromous acid. The reaction of HOBr with NH 2 Cl is at least 3 orders of magnitude faster than the reaction of Br - with NH 2 Cl at pH 6.5