Metrohm 930 Compact IC Flex Oven/SeS/Deg User Manual Page 95
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5 Operation and maintenance
930 Compact IC Flex Oven/SeS/Deg (2.930.2460)
￭￭￭￭￭￭￭￭
87
The time upon stopping the watch corresponds to the "transfer
time".
If the sample is injected automatically, the rinsing time has to be at least
three times the transfer time.
Checking the rinsing time
You can determine if the applied rinsing time is sufficient by measuring
the sample carry-over directly. Proceed as follows to do this:
1
Preparing two samples
￭ Sample A: A typical sample for the application.
￭ Sample B: Ultrapure water.
2
Determining "Sample A"
Allow "Sample A" to run through the sample path for the duration of
the rinsing time; inject and then measure it.
3
Determining "Sample B"
Allow "Sample B" to run through the sample path for the duration of
the rinsing time; inject and then measure it.
4
Calculating the sample carry-over
The sample carry-over corresponds to the ratio of the peak areas of
the measurement from Sample B to the measurement from Sample
A. The smaller this ratio is, the smaller the sample carry-over. This
ratio can be changed by varying the rinsing time. This can be used to
determine the required rinsing time for the application.
5.16 Separation column
5.16.1 Separating efficiency
The analysis quality that can be attained depends in a large part on the
separating efficiency of the separation column being used. The separation
efficiency of the selected separation column must be sufficient for the cur-
rent analysis problems. If difficulties arise, start by checking the quality of
the separation column in each case by recording a standard chromato-
graph.
You can find detailed information on the separation columns available
from Metrohm in the leaflet provided along with your separation column,
in the Metrohm IC Column Program (available from your Metrohm
- 930 Compact IC Flex 1
- Table of contents 5
- 4 Operation 53 6
- 6 Troubleshooting 90 7
- 8 Warranty (guarantee) 100 7
- 9 Accessories 102 7
- Index 104 7
- Table of figures 8
- 1 Introduction 9
- ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 10
- ￭￭￭￭￭￭￭￭ 10
- 1.2 Intended use 11
- 1.3 Safety instructions 11
- 1.3.2 Electrical safety 12
- 1.3.5 Recycling and disposal 13
- 1.4 Symbols and conventions 14
- 2 Overview of the instrument 15
- 2.2 Rear 16
- 2 Overview of the instrument 17
- ￭ Openings on the door 18
- ￭ Openings on the back panel 18
- 3 Installation 21
- ￭ Hex key 4 mm (6.2621.030) 24
- 3.5 Column oven 27
- 3 Installation 33
- 3.11 Injection valve 34
- 3.12 Suppressor 36
- 3.13 Metrohm CO 44
- 3.13.2 Connecting the MCS 45
- 3.14 Installing the detector 48
- 3.18 Initial start-up 52
- 3.21 Conditioning 59
- 4 Operation 61
- 5 Operation and maintenance 62
- 5.2 Capillary connections 64
- 5.3 Servicing the door 64
- Figure 15 Column oven 65
- 5.5 Handling the eluent 66
- 5.5.2 Changing the eluent 67
- 5 Operation and maintenance 69
- 5.11 Injection valve 85
- 5.12 Suppressor 85
- 5.12 Suppressor 86
- 5.14 Servicing the detector 94
- 5.15 Rinsing the sample path 94
- 5.16 Separation column 95
- 6 Troubleshooting 98
- 6 Troubleshooting 101
- 7 Technical specifications 102
- 7.4 Housing 103
- 7.5 Leak sensor 103
- 7.6 Column oven 103
- 7.8 High-pressure pump 104
- 7.7 Eluent degasser 104
- 7.9 Injection valve 105
- 7.10 Suppressor 105
- 7.11 Metrohm CO 105
- Suppressor (MCS) 105
- 7.12 Detector 106
- 7.13 Sample degasser 106
- 7.14 Power connection 106
- 7.15 Interfaces 106
- 7.16 Safety specifications 107
- 8 Warranty (guarantee) 108
- 9 Accessories 110
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