Metrohm 881 Compact IC pro – Cation - Manual (Page 80)

6.1 Problems and their solutions
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881 Compact IC pro – Cation
Problem Cause Remedy
Separation column – dead
volume at column head. ￭ Install the separation column in reverse
flow direction (if permitted by the leaflet)
and rinse into a beaker.
￭ Replace separation column (see "Connect-
ing and rinsing the separation column",
page 45).
Precision problems -
significant scatter-
ing of the measured
values Injection valve – sample
loop. Check installation of the sample loop (see
Chapter 3.13.1, page 34).
Sample – rinsing volume
too low. Increase rinsing time (see Chapter 5.8, page
66).
Injection valve – defective. Request Metrohm Service.
Unexpected change
to the retention
times in the chroma-
tograms Separation column –
diminished separating effi-
ciency. ￭ Regenerate separation column (see Chap-
ter 5.10.4, page 69).
￭ Replace separation column (see "Connect-
ing and rinsing the separation column",
page 45).
Eluent – Gas bubbles in the
eluent. Check connections of the eluent degasser (see
Chapter 3.9, page 26).
High pressure pump –
defective. Request Metrohm Service.
Vacuum is not being
built Eluent Degasser – Connec-
tor Vacuum on the rear of
the instrument not (tightly)
sealed. ￭ Seal the connector Vacuum tightly with a
6.1446.040 threaded stopper.