Fragmentation ion fraction n f[H2O]+ f[OH]+ f[O]+ f[H3O]+
Natural water Average (stdev) 20 0.76050 (24) 0.19340 (19) 0.02572 (8) 0.02038 (31)
18O enriched Average (stdev) 14 0.76674 (36) 0.19805 (33) 0.01505 (11) 0.02016 (50)