7
Troubleshooting
How to Know When Your System Needs Maintenance
118
TSQ 8000 Evo User Guide
Thermo Scientific
Table 3.
Common Contaminants
Ions (
m/z)
To Monitor
Compound
Possible Source
13, 14, 15, 16, 17, 29, 41,
57
Methane
CI gas
18, 28, 32, 44 or 14, 16, 19 H
2
O, N
2
, O
2
, CO
2
or N, O
Residual air and water, air
leaks, outgassing from
Vespel ferrules
69, 100, 119, 131, 169,
181, 214, 219, 264, 376,
414, 426, 464, 502, 576,
614
PFTBA and related ions
PFTBA (tuning
compound)
31
Methanol Cleaning
solvent
43, 58
Acetone
Cleaning solvent
78
Benzene
Cleaning solvent
91, 92
Toluene or xylene
Cleaning solvent
105, 106
Xylene
Cleaning solvent
151, 153
Trichloroethane
Cleaning solvent
149
Plasticizer (phthalates)
Use of vinyl or plastic
gloves
Peaks spaced 14 amu apart Hydrocarbons
Fingerprints, foreline pump
oil, or other hydrocarbons
Summary of Contents for TSQ 8000
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