Agilent InfinityLab LC Series Vialsamplers User Manual 147
4 Preparing the Module
Solvent Information
Fused silica and Quartz (SiO
2
)
Fused silica is used in Max Light Cartridges. Quartz is used for classical flow cell
windows. It is inert against all common solvents and acids except hydrofluoric
acid and acidic solvents containing fluorides. It is corroded by strong bases and
should not be used above pH 12 at room temperature. The corrosion of flow cell
windows can negatively affect measurement results. For a pH greater than 12,
the use of flow cells with sapphire windows is recommended.
Gold
Gold is inert to all common HPLC solvents, acids and bases within the specified
pH range. It can be corroded by complexing cyanides and concentrated acids like
aqua regia.
Zirconium Oxide (ZrO
2
)
Zirconium Oxide is inert to almost all common acids, bases and solvents. There
are no documented incompatibilities for HPLC applications.
Platinum/Iridium
Platinum/Iridium is inert to almost all common acids, bases and solvents. There
are no documented incompatibilities for HPLC applications.
Fluorinated polymers (PTFE, PFA, FEP, FFKM, PVDF)
Fluorinated polymers like PTFE (polytetrafluorethylene), PFA (perfluoroalkoxy),
and FEP (fluorinated ethylene propylene) are inert to almost all common acids,
bases, and solvents. FFKM is perfluorinated rubber, which is also resistant to
most chemicals. As an elastomer, it may swell in some organic solvents like
halogenated hydrocarbons.
TFE/PDD copolymer tubings, which are used in all Agilent degassers except
1322A/G7122A, are not compatible with fluorinated solvents like Freon,
Fluorinert, or Vertrel. They have limited life time in the presence of
Hexafluoroisopropanol (HFIP). To ensure the longest possible life with HFIP, it is
best to dedicate a particular chamber to this solvent, not to switch solvents, and
not to let dry out the chamber. For optimizing the life of the pressure sensor, do
not leave HFIP in the chamber when the unit is off.
The tubing of the leak sensor is made of PVDF (polyvinylidene fluoride), which is
incompatible with the solvent DMF (dimethyl formamide).
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