Metrohm 2.850.2230, Manual, Page: 119 / 150

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6 Troubleshooting
850 Professional IC–Anion – MSM-HC – MCS – LP Gradient
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109
Problem Cause Remedy
Eluent – Evaporation of the
organic solvent in the elu-
ent. Check the eluent bottle attachment (see Figure
14, page 35) .
Peak areas lower
than expected Sample – Leak in the sam-
ple path. Check the sample path.
Sample – Blockage in the
sample path. Check the sample path.
Sample – Sample loop not
(completely) filled. Prolong the sample transfer time.
Sample – Gas bubbles in
the sample. Use the sample degasser (see Chapter 3.15,
page 48) (if available).
MCS – not connected. Connect the MCS.
Peristaltic pump –
insufficient or no
delivery rate Peristaltic pump – contact
pressure too weak. Correctly set contact pressure (see "Set flow
rate", page 62) .
Peristaltic pump – filter
blocked. Replace the filter (see Chapter 5.12.2.2, page
103) .
Peristaltic pump – pump
tubing defective. Replace pump tubing (see Chapter 5.12.2.1,
page 102) .
Very noisy baseline High pressure pump – con-
taminated pump valves. Clean pump valves (see "Cleaning the inlet
valve and outlet valve", page 86) .
Eluent – Leak in the eluent
path. Check the eluent path.
Eluent – Blockage in the
eluent path. Check the eluent path.
High pressure pump –
defective piston seals. Replace piston seals (see "Replacing the piston
seal", page 83) .
MCS –
CO
2
adsorption cartridge
exhausted.
Replace CO
2
adsorption cartridge (see Chapter
5.13.1, page 104) .
Pulsation damper not con-
nected. Connect the pulsation damper (see Chapter
3.14, page 47) .
Pulsation damper not con-
nected. Connect pulsation damper (see Chapter 3.14,
page 47) .