Gl. Madsen et al., PROTON NUCLEAR-MAGNETIC-RESONANCE DETERMINATION OF HEXAMETHYLENETETRAMINE IN THE PRESENCE OF FORMALDEHYDE AND URINE, Analyst, 121(4), 1996, pp. 567-570
A new proton NMR method has been developed for micro-amount determinat
ion of aqueous hexamethylenetetramine (HMT) alone, in the presence of
large amounts of formaldehyde, and in urine, The method is based on th
e direct determination of HMT in [H-2(3)]acetonitrile containing aniso
le as the internal reference standard. HMT is determined in the range
5-50 mu g using a 5 mm NMR tube.