38 1260 Infinity Micro Degasser Service Manual
4 Using the Micro Vacuum Degasser
Solvent Information
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)
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 G1322A, 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.
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