Metrohm 850 Professional IC Anion MCS Prep 1 - Manual (Page 114)

5.1 Problems and their solutions
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850 Professional IC – Anion – MCS – Prep 1
Problem Cause Remedy
MCS – vacuum pump
defective. Contact the Metrohm Service.
Background conduc-
tivity too high MSM – not connected. Connect the MSM (see Chapter 2.16, page
49).
MCS – not connected. Connect the MCS.
Incorrect eluent. Change eluent (see Chapter 4.4.2.3, page 74).
MSM – regeneration or
rinsing solution flow prob-
lems. Check the flow of the regeneration and rinsing
solution (see Chapter 2.16.2, page 49).
Data of the separa-
tion column cannot
be read. Column chip contamina-
ted. Clean contact surfaces of the column chip
(with alcohol).
Column chip defective. 1. Save column configuration in MagIC Net.
2. Notify Metrohm Service.
Individual peaks
greater than expec-
ted Sample – Carry-over of the
samples from previous
measurement. Rinse system longer between two samples.
MSM – No (or insuf-
ficient) pumping of
regeneration or rins-
ing solution Leak in the system. Check connections.
Peristaltic pump – contact
pressure too weak. Correctly set contact pressure (see "Set flow
rate", page 56).
Peristaltic pump – filter
blocked (see Figure 30,
page 54). Replace the filter (see "Replacing the filter",
page 97).
MSM – backpressure too
high. Clean the MSM (see Chapter 4.11.3.2, page
91) or replace parts (see Chapter 4.11.3.3,
page 94).
Peristaltic pump – pump
tubing defective. Replace pump tubing (see Figure 29, page 53).
Poor reproducibility
of the retention
times Eluent – Leak in the eluent
path. Check the eluent path.
Eluent – Blockage in the
eluent path. Check the eluent path.
Chromatograms
have poor resolution Separation column –
diminished separating effi-
ciency. ￭ Regenerate separation column (see Chap-
ter 4.15.4, page 100).