Agilent 6500 Series Q-TOF LC/MS Maintenance Guide 39
Maintenance 2
To prepare tuning mix
*Peaks marked with asterisks were also observed under chemical ionization mode using a direct
insertion probe.
26 3558.33480 3648.33007
27 3694.30961 3784.30487
28 3830.28441 3920.27968
29 3966.25922 4056.25449
Table 5 Elemental compositions and calculated masses of sodium trifluoroacetate ion
clusters by electrospray ionizationunder positive-ion ([(CF3COONa)nNa]1) and
negative-ion ([(CF3COONa)nCF3COO]2) modes (continued)
n Positive-ion calculated mass Negative-ion calculated mass