Metrohm 850 Professional IC Anion MCS Gradient User Manual
Page 110
5.1 Problems and their solutions
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850 Professional IC –Anion – MCS – Gradient
Problem
Cause
Remedy
Eluent – Evaporation of the
organic solvent in the elu-
ent.
Check the eluent bottle attachment (see Figure
13, page 28).
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 2.13,
page 39) (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 53).
Peristaltic pump – filter
blocked.
Replace the filter (see Chapter 4.12.2.2, page
94).
Peristaltic pump – pump
tubing defective.
Replace pump tubing (see Chapter 4.12.2.1,
page 93).
Very noisy baseline
High pressure pump – con-
taminated pump valves.
Clean pump valves (see Chapter 4.5.2, page
72).
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 Chapter 4.5.2, page
72).
MCS –
CO
2
adsorption cartridge
exhausted.
Replace CO
2
adsorption cartridge (see Chapter
Pulsation damper not con-
nected.
Connect the pulsation damper (see Chapter
2.12, page 37).
Pulsation damper not con-
nected.
Connect pulsation damper (see Chapter 2.12,
page 37).