Metrohm 940 Professional IC Vario ONE/SeS/Prep 2 - Manual (Page 12)

2.2 Intended use
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940 Professional IC Vario ONE/SeS/Prep 2 (2.940.1420)
Metrohm CO
2
Suppressor (MCS)
The Metrohm CO
2
Suppressor (MCS) removes the CO
2
from the eluent
flow. This lowers the background conductivity, improves detection sensi-
tivity and minimizes the injection peak and carbonate peak.
Detector
Metrohm offers a series of different detectors for various analysis tasks. A
suitable detector type must be ordered as a separate accessory.
Sample degasser
The sample degasser removes gas bubbles and dissolved gases from the
sample.
Peristaltic pump
The peristaltic pump is used for pumping sample and auxiliary solutions. It
can rotate in both directions.
6-port valve
The 6-port valve mimics the injection valve in its design. It is used during
sample preparation and serves as a unit for switching between two differ-
ent liquids, such as switching between sample dilution and direct injection
during sample dilution.
Separation column
The intelligent separation column separates different components accord-
ing to their interactions with the column. Metrohm separation columns
are equipped with a chip where their technical specifications and history
(start-up, operating hours, etc) are stored.
2.2 Intended use
The 940 Professional IC Vario ONE/SeS/Prep 2 is used for the determina-
tion of anions or polar substances with sequential suppression using ion
chromatography.
Sequential suppression consists of:
￭ Chemical suppression with a Metrohm Suppressor Module (MSM) and
subsequent
￭ CO2 suppression with the Metrohm CO2 Suppressor (MCS).
Background conductivity is reduced to a minimum with sequential sup-
pression.
The instrument can also be used as needed for the determination of cati-
ons or anions without chemical suppression.