Metrohm 850 Professional IC MSM-HC MCS Prep 3 - Manual (Page 128)

6.1 Problems and their solutions
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
118 ￭￭￭￭￭￭￭￭
850 Professional IC Anion – MSM-HC – MCS – Prep 3
Problem Cause Remedy
MCS – vacuum pump
defective. Contact the Metrohm Service.
Background conduc-
tivity too high MSM-HC – not connected. Connecting the MSM-HC (see Chapter 3.18,
page 62).
MCS – not connected. Connect the MCS.
Incorrect eluent. Change eluent (see Chapter 5.4.2.3, page 82).
MSM-HC – regeneration or
rinsing solution flow prob-
lems. Check the flow of the regeneration and rinsing
solution (see Chapter 3.18.2, page 62).
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-HC – No (or
insufficient) pump-
ing of regeneration
or rinsing solution Leak in the system. Check connections.
Peristaltic pump – contact
pressure too weak. Correctly set contact pressure .
Peristaltic pump – filter
blocked . Replace the filter .
MSM-HC – backpressure
too high. Clean the MSM-HC (see Chapter 5.13.3.2,
page 108) or replace parts (see Chapter
5.13.3.3, page 110).
Peristaltic pump – pump
tubing defective. Replace pump tubing .
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 5.16.4, page 114).