Metrohm 844 UV/VIS Compact IC - Manual (Page 13)

1.1 Instrument description
844 UV/VIS Compact IC / Gebrauchsanweisung 8.844.1051
1
1 Introduction
1.1 Instrument description
The 844 UV/VIS Compact IC is a PC-controlled instrument for
chromatographic analysis that is available in the six following versions:
• 2.844.0010 UV/VIS Compact IC
• 2.844.0020 UV/VIS Compact IC with post column reactor
• 2.844.0030 UV/VIS Compact IC 844: Steel
• 2.844.0110 UV/VIS Compact IC with column heating
• 2.844.0120 UV/VIS Compact IC with post column reactor
and column heating
• 2.844.0130 UV/VIS Compact IC 844 with column heating:
Steel
All the necessary components for chromatography with UV/VIS
detection are contained in the extremely compact housing of the 844
UV/VIS Compact IC:
• Injection valve – for single injections or for use with a sample
changer, e.g. the 838 Advanced Sample Processor.
• High-pressure pump – extremely low pulsation double-piston
pump with a flow range of 0.2 … 2.5 mL/min and a maximum
pressure of 35 MPa (350 bar).
• Pulsation dampener – the pulsation dampener reliably protects
the columns from damage, even with low-level pressure variations
(not necessairy with versions 2.844.0030 and 2.844.0130).
• Column heating – the perfect insulation of the housing creates
thermally stable conditions for the columns (with Versions
2.844.0110, 2.844.0120 and 2.844.0130).
• Columns – whether anion columns, cation columns or separating
columns for organic acids – they all find space in the column
compartment of the 844 UV/VIS Compact IC.
• Post column reactor – in the post column reactor the eluate from
the column and a reagent delivered by a peristaltic pump are
mixed and transported to the detector. In this way ions that cannot
be detected are converted into (optically) detectable species (with
Versions 2.844.0020 and 2.844.0120).
• UV/VIS detector – for the determination of transitional metals with
post column derivation, chromate, bromate, nitrite and nitrate in
strongly polluted waters, as well as various organic ions.