Metrohm 850 Professional IC MSM-HC MCS Prep 3 - Manual (Page 107)

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5 Operation and maintenance
850 Professional IC Anion – MSM-HC – MCS – Prep 3
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5.9 Sample degasser
5.9.1 Operation
If you are working with sample degassing, the longer "transfer time" (see
Ascertaining the transfer time, page 95) means that it is also necessary to
rinse for longer (with the subsequent sample). The rinsing time should be
at least 3 times the "transfer time" so as to minimize the carry-over
effects. The "transfer time" itself depends on the pump capacity, total
capillary volume and volume of gas removed (i.e. the amount of gas in the
sample).
Note
When using the sample degasser, the rinsing time extends by at least 2
minutes.
5.10 Sample preparation module (SPM)
5.10.1 Protection
To protect the SPM against foreign particles or bacterial growth, a filter
must be mounted between the peristaltic pump and the inlet capillaries of
the SPM .
5.10.2 Operation
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 the diagram outlined in Figure 24.
The SPM consists of 3 neutralization units, which are used, regenerated
with perchloric acid or rinsed with ultra pure water in rotation. In order to
record every new chromatogram under comparable conditions, you
should normally work with a freshly regenerated 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.