Identification of Halohydrins as Potential Disinfection By-Products in Treated Drinking Water

Table 2

Accurate mass measurements (NH₃ CI mode) of the DBPs using GCT and FTICR instruments.

DBP	Formula	Mass (calculated)	Mass (GCT)^[a]	Dev.^[c]	Mass (FTICR)^[b]	Dev.^[c]
A	C5H13N^35Cl	122.07310	122.07355	3.7	122.07323	1.0
	C4H10NO2Cl	140.04783	140.08465	263	140.08374
	C5H15NO^35Cl	140.08367	140.08465	7.0	140.08374	0.5
	C5H15NO^37Cl l	142.08072	142.08125	3.7	142.08079	0.5
B	C5H13N^79Br	166.02259	166.02425	10.0	166.02249	0.6
	C5H13N^81Br	168.02054	168.02205	9.0	168.02041	0.8
	C5H15NO^79Br	184.03315	—	—	184.03311	0.2
	C5H15NO^81Br	186.03111	—	—	186.03102	0.4
C	C5H15NO^35Cl	140.08367	140.08485	8.4	140.08367	0.0
	C5H15NO^37Cl	142.08072	142.08105	2.3	142.08081	0.6

Note. Measurements obtained using ^[a]treated drinking water samples; ^[b]authentic standards of the halohydrins; ^[c]the deviation from the calculated value is given in parts per million.