Metrohm 828 IC Dual Suppressor - Manual (Page 39)

4.2 Chromatography problems
828 IC Dual Suppressor/ 8.828.1003 Instructions for Use
31
Noisy or unstable baseline • Suppressor cell is not yet
properly equilibrated with the
eluent.
• CO
2
absorber cartridge is
exhausted.
• Fraction of volatile organic
modifiers in eluent is too high.
• Flow rate ratio not correct.
• Leak in the instrument.
• Blockage in flow path.
• Let the system run and wait until the
suppressor is equilibrated.
• Exchange the 6.2827.000 CO
2
absorber
cartridge, see Section 5.4.1.
• Make up a new eluent, refer to Section
3.2.
• Check the flow rate ratio, Section 3.5.
• Check whether liquid is escaping from
drain 20, replace leaking connections.
• See Section 4.3.
Background conductivity
too high • Eluent concentration incorrect.
• Eluent contaminated.
• CO
2
absorber cartridge is
exhausted.
• Flow rate ratio not correct.
• Suppressor cell is exhausted.
• Blockage in flow path.
• Make up a new eluent, take the capacity
of the suppressor into account, see
Section 3.3.
• Make up a new eluent, see Section 3.2.
• Exchange the 6.2827.000 CO
2
absorber
cartridge, see Section 5.4.1.
• Check the flow rate ratio, Section 3.5.
• Regenerate the cell, proceed as
described in Section 5.5.1.
• See Section 4.3.