2 Installation
793 IC Sample Prep Module/ 8.793.1003 Instructions for Use
10
2.3
Connection to a Modular IC System for
Neutralization
An important application for the 793 IC Sample Prep Module is neutrali-
zation of an alkaline sample for anion determination by IC with chemical
suppression. Strong bases (e.g. 30 % NaOH) should not be led unlim-
ited to the SP Module A. To provide a sufficient capacity for exchanging
Na
+
by H
+
Ions, only a small fraction (e.g. 20 µL) is directed to the SP
Module A using a sample loop. The analyte anions are preconcentrated
subsequently on a preconcentration column and finally eluted to the
separation column in counter flow by the eluent.
Therefore, such an IC system corresponds to the
Modular IC System
6
(
MIC 6
: Anion system with chemical suppression, preconcentration
and matrix elimination) enhanced by the 793 IC Sample Prep Module.
If the sample doesn’t require matrix elimination and preconcentration, it
can be treated directly by the SP Module A. This could be an option for
samples containing only low amounts of the cations which have to be
eliminated. For this purpose, a system as described in section 2.4
should by used.
The following pages describe the electronic connections of this system
in combination with the 766 IC Sample Processor on the base of full
control by «
IC Net 2.1
».
2.3.1
Electrical connection
The 793 IC Sample Prep Module is connected to an IC system consist-
ing of 732 IC Detector, 733 IC Separation Center (two injectors), 709 IC
Pump, 752 IC Pump Unit, 753 IC Suppressor Module and 762 IC Inter-
face as shown in Fig. 5.
753
793
752
762
733
709
732
PC
6.2134.100
6.2134.080
6.2134.090
6.2128.130
6.2143.210
6.2115.070
6.2125.120
6.2125.090
6.2141.110
6.2143.200
6.2128.180
6.2128.180
6.2128.180
B (LOOP) A (PCC)
Fig. 5: Connection 793 IC Sample Prep Module -
Modular IC System for Neutralization
