Upon dosing of TDMAH, we first observe the immediate formation of sharp bands at 3676, 2188, 1470, and 1370 cm -1 . In addition, broad bands appear in the CH region and at around 1250 and 950 cm -1 . From pulse 3 on, the broad bands appear as distinct signals at 2876, 2833, 2782, 1254, 952, and 910 cm -1 . Furthermore, a broad signal develops between 1630 and 1540 cm -1 . Upon further exposure to TDMAH, two low intensity bands appear at 1140 and 1060 cm - 1 , while the band at 1470 cm -1 develops into a broad band. The characteristic signals (2876, 2833, 2782, 1470, 1254, 1140, 1060, and 952 cm -1 ) and the band at 910 cm -1 increase in intensity until saturation around pulse 60. The signals at 3676, 2188, between 1630 and 1540, and at 1370 cm -1 first increase in intensity, reach a maximum and then decrease again.