Metrohm 850 Professional IC AnCat Nonsuppressed - Manual (Page 92)

6.1 Problems and their solutions
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850 Professional IC–AnCat – non-suppressed
6 Troubleshooting
6.1 Problems and their solutions
Problem Cause Remedy
Marked drop in
pressure Leak in the system. Check and seal connections (see Chapter 3.5,
page 17).
Marked rise in pres-
sure 6.2821.120 inline filter
blocked. Replace 6.2821.130 filter (see Chapter 5.6,
page 74).
Conductivity detector
blocked. ￭ Shorten capillary ends by several mm (see
Chapter 5.11.1, page 78).
￭ Rinse detector against the normal flow
direction (see Chapter 5.11.1, page 78).
Guard column – blocked. Replace guard column (see Chapter 3.18,
page 53).
Separation column –
blocked. ￭ Regenerate separation column (see Chap-
ter 5.12.4, page 80).
￭ Replace separation column (see "Connect-
ing and rinsing the separation column",
page 56).
Note: Samples should always be microfiltered
(see Chapter 5.7, page 76).
Injection valve – valve
blocked. Have the valve cleaned (by Metrohm service
technicians).
Drift of the baseline Thermal equilibrium not yet
attained. Condition (see Chapter 3.15, page 47) instru-
ment with the column thermostat (see Chap-
ter 4.2, page 58) switched on .
Leak in the system. Check and seal connections (see Chapter 3.5,
page 17).
Eluent – Evaporation of the
organic solvent in the elu-
ent. Check the eluent bottle attachment (see Figure
14, page 32).
Peak areas lower
than expected Sample – Leak in the sam-
ple path. Check the sample path.