Metrohm 850 Professional IC AnCat Nonsuppressed - Manual (Page 28)

3.5 Capillary connections in the IC system
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850 Professional IC–AnCat – non-suppressed
Connection capillary
PEEK capillaries and PTFE capillaries are used in the IC system.
PEEK capillaries (poly-
etheretherketone) PEEK capillaries are temperature-resistant up to 100°C, stable under pres-
sure up to 400 bar, flexible, chemically inert and exhibit an extremely
smooth surface. They can be readily cut down to the desired length with
the capillary cutter.
Usage:
￭ 6.1831.010 PEEK capillary (internal diameter of 0.25 mm) for the entire
high pressure range.
￭ 6.1831.030 PEEK capillary (internal diameter of 0.75 mm) for sample
handling in the ultra trace range.
Caution
For the capillary connections between the injection valve (see Chapter
3.14, page 44) and detector (see Chapter 3.16, page 50), PEEK
capillaries with an internal diameter of 0.25 mm must be used. These
are already connected to a newly delivered instrument.
PTFE capillaries (poly-
tetrafluoroethylene) PTFE capillaries are transparent and enable visual tracing of the liquids to
be pumped. They are chemically inert, flexible and temperature-resistant
up to 80°C.
Usage:
PTFE capillaries (6.1803.0x0) are used for the low pressure range.
￭ PTFE capillaries with internal diameter of 0.5 mm for sample handling.
￭ PTFE capillaries with internal diameter of 0.97 mm for the sample han-
dling as for rinsing and regeneration solutions (they do not have to be
in the scope of delivery of the instrument).
Note
Capillaries must have a flawless level cut edge. For cutting PEEK capilla-
ries only use the 6.2621.080 capillary cutter.