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- Posts: 2
- Joined: Wed Aug 10, 2022 8:35 am
We have a problem with a Metrohm IC system in our lab. The anion baseline is uneven and has high background conductivity, as reflected by a big water dip at the start of each chromatogram and a system peak after NO2-. I think it was caused by the suppressor drying out as a colleague may not have sufficiently topped up the H2SO4 and water bottles at the start of a run.
I have tried regenerating the suppressor with a 100mM H2SO4, 100mM oxalic acid 5% acetone solution, stepping the rotor every 15 minutes, but this has not been successful - I'm still getting a large water dip and system peak as well as an uneven baseline.
Can anyone suggest a potential solution to the problem?