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5.1 Practical notes on ion chromatography
792 Basic IC
139
5 Notes – Maintenance – Faults
5.1 Practical notes on ion chromatography
5.1.1 Separating columns
Separation efficiency
The attainable quality of analyses with the 792 Basic IC depends to a
large extent on the separation efficiency of the column used. When pur-
chasing an IC column you should ensure that the separation efficiency
suffices for the analysis problems at hand. Ascertain the
characteristic
data of the IC column
on the standard chromatogram enclosed with
the column such as capacity factors, selectivity, plate number and reso-
lution and check these data with your own measurements. If any diffi-
culties arise, you should always first check the quality of the column by
recording a
standard chromatogram
.
You will find additional general tips on handling IC separating columns
in the
8.732.2003 Metrohm Monograph "Ion chromatography"
and
in the
8.792.2003 Metrohm Monograph "Practical ion chromatog-
raphy"
, as well as detailed information on the separating columns
available from Metrohm (see
section 6.3.2
) in the leaflets supplied and
in the
8.732.2013
"IC Application Notes"
folder.
Protection
To protect the column against foreign particles which could have an
adverse influence on the separation efficiency, we advise you to subject
both the eluents and all samples to
microfiltration
(0.45
P
m filter) and
to siphon the eluent through the
6.2821.090 Aspirating filter
.
To avoid contamination by abrasive particles arising from piston seals
of the high-pressure pump, it is advantageous to install an
in-line filter
between the pump and the injection valve. In the 792 Basic IC a
6.2821.100
Filter unit PEEK
is already mounted for this purpose
(see
section 2.6.2
).
The use of readily interchangeable
precolumns
serves to protect the
actual separating columns and increase their service life appreciably.
The precolumns available from Metrohm (see
section 6.3.2
) are either
actual precolumns or so-called precolumn cartridges that are used to-
gether with the 6.2821.050 Twin cartridge holder or the 6.2828.110 Pre-
column cartridge holder (see
section 2.7
).
- BasicBasic 1
- Table of contents 2
- Notes – Maintenance – Faults 5
- Appendix 6
- List of figures 7
- 1 Introduction 10
- 1 Introduction 15
- 1.733.0110 Detector block) 15
- 1.3.1 Organization 17
- SYSTEM STATE 18
- <OK> 18
- 1.4 Safety notes 19
- 2 Installation 20
- 2.2.1 Packaging 22
- 2.2.2 Check 22
- 2.2.3 Location 22
- 2.3.5 Filter unit PEEK 25
- 2.4 Mains connection 26
- 2.4.2 Fuses 27
- 2.5 Connection to the PC 28
- 2.5.3 Basic settings 29
- Hardware 31
- Hardware settings 31
- Cell constant 31
- 2.6 High-pressure pump 32
- File / Open / System 34
- Default.smt 34
- <Open> 34
- 2 mL/min 35
- <Send to unit> 35
- Injector 38
- Flow rate 39
- <On> 39
- <Off> 39
- 2.8 Suppressor module 44
- 2.9 Putting into operation 50
- Suppressed anion 51
- Prep MSM.smt 51
- Startup determination 52
- 2 Installation 53
- 3 Operating tutorial 54
- 3.2 Preparations 55
- 3.3 Calibration 56
- <Concentrations> 61
- <Calibrate> 61
- 3.4 Sample determination 63
- 4 Operation 66
- 4.1.2 Glossary 67
- 4.1.4 Main window elements 69
- 4.1.9 Help 72
- 4.2.1 Fonts 73
- 4.2.2 Security system 73
- 4.2.3 Global settings 74
- 4.2.4 COM port 76
- 4.3 Systems 77
- 4.3.3 System functions 78
- 4.3.4 PC icon 80
- 4.3.5 Watch window 80
- 4.3.6 Instrument icon 81
- 4.3.7 System state window 87
- 4.3 Systems 88
- Error messages 88
- 4.4 Methods 89
- Data Log 95
- <Add new> 95
- New comment 95
- 4.4.3 Method setup 96
- 4.4.4 Integration 99
- 792 Basic IC 100
- 792 Basic IC 101
- Component table 103
- Components table 105
- 4.4.6 Report output 115
- 4.5 Chromatograms 127
- 4.5.4 Peak editor 136
- 4.5.5 Printing 138
- 4.6 Batch reprocessing 141
- REPROCESS / 145
- <Merge> 145
- Appearance 145
- File / Save / Chroma 145
- 5.1.1 Separating columns 148
- 5.1.2 High-pressure pump 149
- 5.1.3 Eluents 150
- 5.1.4 Peristaltic pump 150
- 5.1.5 Suppressor module 151
- 5.1.6 Connections 151
- 5.2.1 General information 152
- 5.2.2 Passivation 152
- 5.2.3 Recycling 153
- 5.2.4 Shutdown 153
- 90 and 158
- 5.3 Faults and malfunctions 165
- 6 Appendix 168
- 6.1.3 Injection valve 169
- 6.1.4 High-pressure pump 169
- 6.1.5 Peristaltic pump 170
- 6.1.6 Suppressor module 170
- 6.1.7 RS232 interface 170
- 6.1.8 Mains connection 171
- 6.1.9 Safety specifications 171
- 6.1.11 Ambient temperature 172
- 6.1.12 Housing 172
- 6.2 Standard equipment 173
- 6.3 Optional accessories 176
- 6.3 Optional accessories 178
- 6 Appendix 179
- 6.4 Warranty and conformity 185
- EU Declaration of Conformity 186
- 6.5 Index 188
- 6.5 Index 190
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