4 connection of peek capillaries – Metrohm 790 Personal IC User Manual
Page 26
2.3 Attaching the accessories
790 Personal IC
17
2.3.4
Connection of PEEK capillaries
For the connections between high-pressure pump and detector block
6.1831.010 PEEK capillaries (i.d. = 0.25 mm, e.d. =
1
/
16
"
) are used
which are connected using either
6.2744.010 PEEK compression fit-
tings (long) or 6.2744.070 PEEK compression fittings (short).
These PEEK connectors can also be used to connect 6.1822.010 PTFE
microcapillaries (i.d. = 0.3 mm). Proceed as follows:
Capillaries fitted with new connectors must have a perfectly flat cut
surface. To cut PEEK or PTFE capillaries it is best to use the
6.2621.080 Capillary tubing cutter.
1 Mount compression fitting
Slide a compression fitting 46
46
46
46 (6.2744.010) or a compression
fitting 47
47
47
47 (6.2744.070) over the end of the capillary 48
48
48
48 to be
fastened as shown in Fig. 7.
2 Insert capillary in connection
Push capillary end in the corresponding connection as far as it
will go (to avoid dead volume).
3 Tighten compression fitting
Tighten compression fitting 46
46
46
46 or 47
47
47
47 by hand (never use tools).
46
46
46
46 Compression
fitting
(6.2744.010)
47
47
47
47 Compression fitting
(6.2744.070)
48
48
48
48 Capillary
6.1831.010 PEEK capillary or
6.1822.010 PTFE microcapillary
46
46
46
46
48
48
48
48
47
47
47
47
Fig. 7:
Connectors for capillaries