Metrohm 850 Professional IC Anion MSM-HC MCS Gradient - Manual (Page 30)

3.5 Capillary connections in the IC system
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850 Professional IC
4
1 2 3
Figure 4 Connection of capillaries with pressure screws
1 PEEK pressure screw 6.2744.014
Use on the injection valve. 2 Connection capillary
3 PEEK pressure screw, short 6.2744.070
For use on the high pressure pump, the
purge valve, the inline filter, the pulsation
damper, the guard column and the separa-
tion column. 4 PEEK pressure screw, long 6.2744.090
Usage on other components. Is not used on
all instruments.
Note
In order to keep the dead volume as low as possible, capillary connec-
tions should generally be as short as possible.
Note
For an improved overview, capillary and tubing connections can be
bundled with the 6.1815.010 spiral band.
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.