Metrohm 872 Extension Module Suppression - Manual (Page 40)

5.4 Suppressor/SPM ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
32 ￭￭￭￭￭￭￭￭ 872 Extension Module Suppression
5.4.3 Operation Sample Preparation Module (SPM)
Caution
The neutralization units must never be regenerated in the same flow
direction the eluent is pumped. Therefore always mount the inlet and
outlet capillaries according to diagram outlined in figure 9.
The SPM consists of 3 neutralization units, which are in rotation used for
neutralization – regenerated with 100 mmol/L perchloric acid – rinsed
with ultra pure water . In order to record every new chromatogram under
comparable conditions, you should normally work with a freshly regener-
ated SPM.
Caution
The SPM must never be switched over in a dry state, as there is a risk of
jamming. If the SPM is in a dry state, the SPM must be rinsed for at
least 5 minutes before it may be switched over.
Caution
In the case of reduced capacity or high backpressure, the SPM must be
regenerated (see Chapter 5.4.4.2, page 33), cleaned (see Chapter
5.4.4.3, page 35) or replaced (see Chapter 5.4.4.4, page 36).
5.4.4 Maintenance
Note
The following chapters equally apply to the suppressor and the sample
preparation module (SPM).
5.4.4.1 Components of the suppressor
The SPM is made up of the same components as the suppressor.