Thermo Finnigan LTQ - Solvent and Gas Purity Requirements

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Solvent and Gas Purity Requirements
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xviii_______________________ Finnigan LTQ Hardware Manual _______________________
Solvent and Gas Purity Requirements
Use the highest purity solvents available. The LTQ MS detector is extremely
sensitive to solvent impurities. Some solvent impurities are transparent to
UV/Visible detectors, but are easily detected by the LTQ MS detector. Liquid
chromatography grade is the minimum acceptable purity. Higher grade
solvents are preferred. Distilled water is recommended. Deionized water
contains chemicals and is not recommended.
The following is a list of international sources that can supply high quality
solvents:
The LTQ MS detector uses helium as a collision gas. The helium should be
high purity (99.995%). The required gas pressure is 135 ± 70 kPa (20 ± 10
psig). Thermo Electron has found that particulate filters are often
contaminated and are therefore not recommended.
The LTQ MS detector uses nitrogen as a sheath gas and auxiliary gas. The
nitrogen should be high purity (99%). The required gas pressure is 690 ± 140
kPa (100 ± 20 PSI).
Solvent Source
Telephone Number
Mallinckrodt/Baker, Inc.
Tel: (800) 582-2537
Fax: (908) 859-9370
Burdick & Jackson, Inc.
Tel: (800) 368-0050
Fax: (616) 725-6216
E. M. Science, Inc.
Tel: (800) 222-0342
Fax: (800) 336-4422