5 troubleshooting, 1 problems and their solutions, Problems and their solutions – Metrohm 850 Professional IC Cation - Prep 2 User Manual

Page 98

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5.1 Problems and their solutions

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88

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850 Professional IC – Cation – Prep 2

5 Troubleshooting

5.1

Problems and their solutions

Problem

Cause

Remedy

Marked drop in
pressure

Leak in the system.

Check and seal connections (see Chapter 2.5,
page 17)
.

Marked rise in pres-
sure

6.2821.120 inline filter
blocked.

Replace 6.2821.130 filter (see Chapter 4.6,
page 78)
.

Conductivity detector
blocked.

Shorten capillary ends by several mm (see
Chapter 4.12.1, page 85)
.

Rinse detector against the normal flow
direction (see Chapter 4.12.1, page 85).

Guard column – blocked.

Replace guard column (see Chapter 2.19,
page 57)
.

Separation column –
blocked.

Regenerate separation column (see Chap-
ter 4.13.4, page 87)
.

Replace separation column (see "Connect-
ing and rinsing the separation column",
page 60)
.

Note: Samples should always be microfiltered
(see Chapter 4.7, page 80).

Injection valve – valve
blocked.

Have the valve cleaned (by Metrohm service
technicians).

Drift of the baseline

Thermal equilibrium not yet
attained.

Condition (see Chapter 2.16, page 51) instru-
ment with the column thermostat (see Chap-
ter 3.2, page 62)
switched on .

Leak in the system.

Check and seal connections (see Chapter 2.5,
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.

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