Table 2.

m/z values (dominant ion peak), proposed product ions and branching ratio percentages resulting from the reaction of H₃O⁺ with isoflurane using PTR-MS (reduced electric field of 138 Td) and SIFT-MS [2].

m/z	Proposed production	% PTR-MS	% SIFT-MS [2]
51	${\mathrm{\text{CHF}}}_2^{+}$	12	—
67	CF2HO+	—	15
67	CHFCl+	50	—
99	CF3CH2O+	—	10
117	CF3CHCl+	6	30
119	${\mathrm{\text{CF}}}_{\mathrm{\text{3}}}{\mathrm{\text{CFHOH}}}_2^{+}$	—	25
147a	CF3HOCHClCH+	—	10
163	CF3CClOCF+	24	—
165	${\mathrm{\text{CF}}}_{\mathrm{\text{2}}}{\mathrm{\text{HOCHClCF}}}_2^{+}$	8	10

^aIn the paper by Wang et al the ion at m/z 147 is incorrectly given as CF₂HOCHClCH⁺.

Note: The percentages have taken into account the ³⁷Cl isotope for the chlorine containing ions. For the PTR-MS studies the product ion branching percentages have an error of approximately  ±20%.