Metrohm 881 Compact IC pro – Anion – MCS - Manual (Page 92)

5.7 Sample degasser
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881 Compact IC pro – Anion – MCS
5.7 Sample degasser
5.7.1 Operation
If you are working with sample degassing, the longer "transfer time" (see
Ascertaining the transfer time, page 83) 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.
5.8 Inline sample preparation
To protect the separation column (see Chapter 3.21, page 60) against for-
eign particles which can affect the separating efficiency, we recommend
that all samples undergo a microfiltration (filter 0.45 µm). The ultrafiltra-
tion cell can be used for filtration (see manual of the IC Equipment for
Ultrafiltration).
Samples containing significant amounts of gas should be degassed. The
sample degasser (see Chapter 3.13, page 37) is used for degassing.
Matrix-loaded samples (e.g. blood, oil) should be prepared for the meas-
urement by means of dialysis (see manual on the IC Equipment for Dialy-
sis).
If the concentration of the sample is too high, the sample should be dilu-
ted before feeding (see documentation on the IC Equipment for Sample
Dilution).
For an overview of all Metrohm inline sample preparation methods go to
the following website:
http://misp.metrohm.com