Metrohm 833 IC Liquid Handling Unit - Manual (Page 12)

1 Introduction
833 IC Liquid Handling Unit / Instructions for Use 8.833.1003
4
1.1.4 833 IC Liquid Handling Dialysis Unit
As well as the basic instrument, the IC Liquid Handling Dialysis Unit
833 includes a dialysis cell upstream from the sample injector.
The 833 IC Liquid Handling Dialysis Unit is used for online sample
preparation in ion chromatography and allows the use of automatic
sample dialysis immediately before sample injection. As well as the 2-
channel peristaltic pump of the basic instrument for transferring the
sample and acceptor solution from the dialysis cell itself, the ions from
the flowing sample solution are enriched in the stationary acceptor
solution and then injected directly into the IC system. As a result of this
special stopped flow technique, for which an application for a patent
has been made by Metrohm, 100% sample concentration can be
achieved in the acceptor solution and in this way it is possible to carry
out calibration with external standards in a very easy manner.
The operation of the 833 IC Liquid Handling Dialysis Unit requires
the use of an 820 IC Separation Center with one injector and an
additional 833 IC Liquid Handling Pump Unit for the sample tramsport.
These systems, which are described in the Instructions for Use, require
the following instruments:
Operation without suppressor
2.819.0110 IC Detector
2.820.0210 IC Separation Center
2.818.0110 IC Pump
2.833.0040 IC Liquid Handling
Dialysis Unit
2.833.0010 IC Liquid Handling
Pump Unit
Operation with suppressor
2.819.0110 IC Detector
2.820.0230 IC Separation Center
2.818.0110 IC Pump
2.833.0040 IC Liquid Handling
Dialysis Unit
2.833.0010 IC Liquid Handling
Pump Unit (2 x)