Metrohm 940 Professional IC Vario ONE/ChS/LPG - Manual (Page 11)

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1 Introduction
940 Professional IC Vario ONE/ChS/LPG (2.940.1250)
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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.
Low-pressure gradient
Up to three different eluents can be mixed using the low-pressure gradi-
ent. They are mixed in the low-pressure zone, i.e. before the eluent is fed
to the high-pressure pump.
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.
1.2 Intended use
The 940 Professional IC Vario ONE/ChS/LPG is used for the determination
of anions or polar substances using chemical suppression using ion chro-
matography when the complex separation problem requires the use of
gradients.
The low-pressure mixing valve and two additional eluent degassers in the
lower plug-in are used for the controlled mixing of up to three eluents.
It can also be used as needed for the determination of cations or anions
without chemical suppression.
The present instrument is suitable for processing chemicals and flammable
samples. Usage of the 940 Professional IC Vario therefore requires the
user to have basic knowledge and experience in handling toxic and caustic
substances. Knowledge with respect to the application of the fire preven-
tion measures prescribed for laboratories is also mandatory.