Drawell CIC-D100 User manual

1
User Manual of
CIC-D100 Ion Chromatograph
重庆卓析仪器仪表有限公司
Chongqing Drawell Instrument Co., Ltd.

Statement
User Manual of CIC-D100 Ion Chromatograph
All rights of ©2018 are reserved by Chongqing Drawell Instrument Co., Ltd.
This publication is protected by copyright law. It should not be copied, distributed,
disseminated, transcribed, stored in the retrieval system, or translated into other national
languages or computer languages in any form or way. Without the permission of
Chongqing Drawell Instrument Co., Ltd., it should not be disclosed to any third party.
Chongqing Drawell Instrument Co., Ltd. reserves the right to modify this
publication at any time according to the content of this publication. If you have any questions,
please call us or our branches and technical service centers in various regions.

User Manual of CIC-D100 Ion Chromatograph
I
Contents
CONTENTS...................................................................................................................................................................I
INTRODUCTION........................................................................................................................................................ 1
1 INSTRUMENT INTRODUCTION......................................................................................................................... 7
1.1 FRONT PANEL OF THE INSTRUMENT...................................................................................................................... 7
1.2 TOP COVER OF THE INSTRUMENT..........................................................................................................................8
1.3 COMPONENT PANEL OF THE INSTRUMENT............................................................................................................ 8
1.4 REAR PANEL OF THE INSTRUMENT......................................................................................................................10
2 INSTRUMENT COMPONENTS...........................................................................................................................11
2.1 INFUSION PUMP...................................................................................................................................................11
2.1.1 Pressure sensor...........................................................................................................................................11
2.1.2 Exhaust valve..............................................................................................................................................11
2.2 INJECTION VALVE................................................................................................................................................ 12
2.3 COLUMN HEATER................................................................................................................................................ 12
2.4 CONDUCTIVITY CELL.......................................................................................................................................... 13
2.5 AMPERE DETECTOR (OPTIONAL)......................................................................................................................... 13
2.6 SUPPRESSOR....................................................................................................................................................... 15
2.7 ELUENT GENERATOR (OPTIONAL)....................................................................................................................... 16
2.8 SCHEMATIC DIAGRAM OF SYSTEM FLOW PATH....................................................................................................19
3 WORKING SOFTWARE....................................................................................................................................... 21
3.1 KILOSPECTRUM WORKSTATION...........................................................................................................................21
3.2 REVERSE CONTROL SOFTWARE........................................................................................................................... 21
3.2.1 Interface menu function..............................................................................................................................22
3.2.2 Interface button function............................................................................................................................ 32
4 INSTRUMENT OPERATION AND MAINTENANCE......................................................................................37
4.1 START-UP.............................................................................................................................................................37
4.2 WATER QUALITY REQUIREMENTS........................................................................................................................38
4.3 CHECKING ALL CONNECTIONS............................................................................................................................38
4.4 BALANCE SYSTEM.............................................................................................................................................. 38
4.5 PREPARATION OF SAMPLES................................................................................................................................. 39
4.5.1 Selection and preservation of samples....................................................................................................... 39
4.5.2 Sample Pretreatment.................................................................................................................................. 39
4.5.3 Dilution of samples.................................................................................................................................... 40
4.6 INJECTION AND ANALYSIS OF SAMPLES............................................................................................................40
4.6.1 Manual injection........................................................................................................................................ 40
4.6.2 Automatic sampler injection.......................................................................................................................41
4.7 MAINTENANCE................................................................................................................................................... 41
4.7.1 check at any time........................................................................................................................................ 41
4.7.2 Weekly check...............................................................................................................................................42

User Manual of CIC-D100 Ion Chromatograph
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4.7.3 Regular check.............................................................................................................................................42
5 COMMON FAULTS AND TROUBLESHOOTING............................................................................................43
5.1 PUMP PRESSURE FLUCTUATION...........................................................................................................................43
5.2 FREQUENT OVERPRESSURE................................................................................................................................. 43
5.3 LARGE BASELINE NOISE......................................................................................................................................44
5.4 LARGE BASELINE DRIFT......................................................................................................................................45
5.5 TOO HIGH BACKGROUND VALUE.........................................................................................................................45
5.6 LOW RESPONSE VALUE........................................................................................................................................45
5.7 ABNORMAL SUPPRESSOR CURRENT.................................................................................................................... 46
5.8 NO PEAK............................................................................................................................................................. 46
5.9 PEAK TAILING..................................................................................................................................................... 46
5.10 POOR DEGREE OF SEPARATION..........................................................................................................................47
5.11 POOR REPEATABILITY........................................................................................................................................47
5.12 POOR LINEARITY...............................................................................................................................................48
5.13THERE ARE BUBBLES IN INFUSION PUMP........................................................................................................... 48
5.14 HANDLING OF ABNORMAL INSTRUMENT CONTROL.......................................................................................... 49
6 MAINTENANCE.....................................................................................................................................................50
6.1 REMOVAL OF BLOCKING UNITS...........................................................................................................................50
6.2 REPLACEMENT OF PIPELINES AND JOINTS...........................................................................................................50
6.3 REPLACEMENT AND CLEANING OF THE CHECK VALVE....................................................................................... 51
6.3.1 Steps of cleaning check valve.....................................................................................................................51
6.3.2 Replacement of check valve.................................................................................................................. 52
6.4 REPLACEMENT OF SEALING RING OR PLUNGER ROD.......................................................................................... 52
6.5 REPLACEMENT OF CONDUCTIVITY CELL.............................................................................................................53
6.6 REPLACEMENT OF AMPEROMETRIC DETECTION CELL GASKET...........................................................................54
6.7 REPLACEMENT REFERENCE ELECTRODE............................................................................................................55
6.8 REPLACEMENT OF THE SUPPRESSOR...................................................................................................................55
6.9 REPLACEMENT OF THE POWER FUSE...................................................................................................................56
6.10 REPLACEMENT OF THE ELUENT GENERATOR STORAGE TANK........................................................................... 57
6.11 REPLACEMENT OF CAPTURE COLUMN.............................................................................................................. 59
A. NORMS...................................................................................................................................................................60
A.1 ELECTRICAL CORRELATION................................................................................................................................60
A.2 PHYSICAL CORRELATION....................................................................................................................................60
A.3 ENVIRONMENTAL CORRELATION........................................................................................................................60
B. INSTALLATION....................................................................................................................................................61
B.1 EQUIPMENT REQUIREMENTS.............................................................................................................................. 61
B.2 UNPACKING........................................................................................................................................................61
B.3 INSTALLATION SOFTWARE.................................................................................................................................. 62
B.4 CONNECTING THE INSTRUMENT TO COMPUTER................................................................................................. 62
B.5 CONNECTING THE AUTOMATIC SAMPLER TO THE INSTRUMENT (OPTIONAL)..................................................... 62
B.5.1 Steps for connecting SHA-1 to instrument trigger line...........................................................................63

User Manual of CIC-D100 Ion Chromatograph
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B.5.2 Steps for connecting SHA-11D to instrument trigger line...................................................................... 63
B.5.3 Steps for connecting SHA-15 automatic sampler to trigger line of the instrument...................................64
B.5.4 Steps for connecting AS-11 to trigger line of the instrument.................................................................. 65
B.6 CONNECTING POWER CORD................................................................................................................................66
B.7 INSTALLATION OF CHROMATOGRAPHIC COLUMN AND SUPPRESSOR...................................................................66
B.7.1 Installation of chromatographic column................................................................................................... 66
B.7.2 Installation of suppressor.......................................................................................................................... 67
B.8 CONNECTING WASTE LIQUID PIPES.....................................................................................................................67
B.8.1 Installation of waste liquid pipes...............................................................................................................68
B.9 INSTALLATION OF ELUENT BOTTLE.................................................................................................................... 68
B.10 FLUSHING PUMP............................................................................................................................................... 69
B.10.1 Flushing pump head................................................................................................................................ 69
B.10.2 Flushing eluent pipeline.......................................................................................................................... 69
B.11 SYSTEM BALANCE............................................................................................................................................ 70
B.11.1 Backpressure requirement of eluent storage tank.................................................................................... 70
B.12 CONFIRMATION OF OPERATION STATUS............................................................................................................ 71
B.13 PRESSURIZATION OF ELUENT BOTTLE (OPTIONAL)...........................................................................................71

User Manual of CIC-D100 Ion Chromatograph
1
Introduction
Thank you for choosing our CIC-D100 Ion Chromatograph. We will wholeheartedly
provide you with high-quality service.
CIC-D100 Ion Chromatograph adopts bipolar constant temperature conductivity detector,
which can give consideration to the detection of various ions with concentrations different by
four orders of magnitude in the analysis sample. The separation and detection can be carried out
at the same time by one injection, with fast analysis speed and high sensitivity. There is no need
to manually switch different measuring ranges and dilute for multiple times, thus greatly
reducing manual operation and the errors caused thereby.
CIC-D100 Ion Chromatograph can not only provide users with a complete set of solutions
for conventional inorganic anion and cation in drinking water, disinfection by-products and
additives, bromate, organic acid and amine in food, but also easily measure samples containing
both minor components and high-content components such as dialysate and eye washing liquid.
In many other fields, CIC-D100 Ion Chromatograph can also provide complete application
support and extensive and practical application supporting schemes.
The CIC-D100 Ion Chromatograph not only features extensive, perfect and advanced
application and solution capabilities, but also brings users an automatic, humanized and
interesting instrument application experience by combing with automatic control mode and the
upgrade to automatic sampling system at any time.
To facilitate users to get familiar with the operation and simple daily maintenance of the
product as soon as possible, the User Manual is specially provided. It is a necessary document
for the instrument and is recommended to be placed beside the instrument for the staff's
reference at any time. To use this instrument better, please read this manual carefully. This
manual will introduce the details of components and operation of the instrument as well as the
maintenance of common faults and the replacement of instrument accessories, etc.

User Manual of CIC-D100 Ion Chromatograph
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● Safety precautions
CIC-D100 Ion Chromatograph is specially designed for the application of ion
chromatography and should not be used for other purposes. If accidents or losses are caused due
to users' use of the equipment in other aspects, the Company will not assume any responsibility.
If you have any questions, please call us for consultation. Please call [phone] .
This manual contains precautionary instructions and warnings during instrument operation.
Please observe them consciously. Security messages are shown in bold and accompanied by
icons, as shown below.
：remind you of the environment that may affect the instrument but will not
cause personal injury.
：remind you of dangerous environment that may cause serious damage to the
instrument or endanger personal safety.
：remind you of dangerous environment that may cause immediate death or
serious injury.
：Due to the large power supply current used by this instrument, personal
injury such as electric shock may be caused. When handling the instrument, please turn off
the power supply of the instrument and unplug the power cord first. It is forbidden to
move the protective casing of live equipment such as instruments or circuit boards.
● Specific cautions
1. Precautions for electric related operation
：The power cord is used as the main device to cut off the power supply of the
instrument. Ensure that the socket is located near the instrument and easy to insert.
Please pay attention to grounding. See section 1.3.
Caution
Warning
Danger
Electric
shock
Caution

User Manual of CIC-D100 Ion Chromatograph
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：To avoid electric shock, please use the socket with grounding. Do not operate
the instrument without grounding. See section b.6.
：The power supply current used by this instrument is large, which may cause personal
injury such as electric shock. Therefore, please turn off the power supply and unplug the power cord
before handling. When handling the instrument, please fasten the casing of the instrument. It is
forbidden to move the protective casing of live equipment such as circuit boards. See section b.2.
:Before plugging and unplugging the conductivity cell, please turn off the heating button
of the conductivity cell and the power switch of the instrument to avoid the damage to the circuit board.
See section 2.4.
：
The suppressor cable should be connected properly, otherwise no current will be applied.
See section 6.8.
：Do not replace the fuse at will. If you cannot confirm the fuse type, please contact the
instrument manufacturer. See section 6.9.
2. Handling Precautions
：Because the instrument is heavy, it should be handled by two or more persons. During
handling, lift the bases on the left and right sides of the instrument. It is forbidden to lift the front and
back sides, otherwise the soundness of the front door will be damaged. See section B.2.
：The instrument is forbidden to contact sharp objects to avoid scratching of the surface
coating. See section B.2.
3. Precautions for the use of eluent generator
：The liquid storage tank is filled with high-concentration KOH or MSA solution which is
Warning
Electric
shock
Warning
Caution
Caution
Caution
Caution
Warning

User Manual of CIC-D100 Ion Chromatograph
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extremely corrosive. Please do not disassemble the tank by yourself to prevent injury accidents. See
section 2.7.
：Please make sure the system pressure is within the applicable range (≤17MPa) before
using the eluent generator to avoid damaging the equipment. See section 2.7.
：Before using the eluent generator, first start the infusion pump and flush the pipeline
with pure water for 5 minutes. Then open the exhaust valve, set the concentration value and power on;
after using this instrument, close the exhaust valve, power off, and flush the pipeline with pure water for
at least 10min. See section 2.7.
：the concentration range of the eluent generator is 0 mmol/L to 100 mmol/L. Please do
not enter a value greater than 100 in the "Concentration" column. See section 2.7.
：KOH or MSA solution with strong corrosivity is filled in the eluent generation tank.
Please wear rubber gloves and goggles during operation to prevent burns. See section 6.10.
4. Precautions for experimental operation
：injection signal is responded only when sampling is started. See section 3.2.2.
：The experimental operators should conduct the experiment strictly in accordance with
the laboratory operation specifications. Protective equipment such as goggles and laboratory gloves
should be worn during the pretreatment operation to avoid personnel injury caused by improper
operation. See section 4.5.
：During manual injection, the valve pulling time should be less than 0.1s, otherwise the
pipeline will be broken due to too high pressure on the injection valve. See section 4.6.1.
：When using aqueous solution as eluent, bacteria are easily generated, thus affecting the
experiment. The contaminated filter head should be cleaned or replaced in time. See section 4.7.
Warning
Caution
Caution
Warning
Caution
Caution
Caution
Caution

User Manual of CIC-D100 Ion Chromatograph
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：to avoid impurities in the pipeline in the new conductivity cell, ultrapure water should
be used for flushing for about 12h before replacing the new conductivity cell. See section 6.5.
：When using ampere workstation, please wear dust-free gloves to operate to avoid
polluting the electrodes. See section 6.6.
：When installing the chromatographic column, the pump flow rate should be reduced to
0.3 mL/min or less. When the new separation column is connected to the chromatographic system for
the first time, first flush with water and eluent and disconnect the conductivity cell and suppressor to
prevent high conductivity substances or bubbles from entering the conductivity cell or suppressor.
When clean and bubble-free liquid flows out of the outlet of the separation column, connect the
conductivity cell and suppressor. See section B.7.
：to prevent siphoning of waste liquid, please check whether the waste liquid pipe is bent,
squeezed or raised at any time. See section B.8.
：Waste liquid bottles should not be sealed. During the operation of the instrument, the
continuous self-regeneration suppressor uses electrolysis to suppress the background, and a small
amount of oxygen and hydrogen will be generated during electrolysis. Gas should be prevented from
staying in the waste liquid bottle so as not to generate static electricity. In serious cases, there may be
explosion. See section B.8.
：When the instrument is used for the first time or for a long time, or when it is not
normally used, the pump head should be rinsed clean to prevent residual crystals in the pump head
from damaging the pump head. See section B.10
：when replacing the plunger rod, please insert and withdraw the plunger rod vertically.
Any lateral movement will cause the plunger rod to break. See section 6.4.
Caution
Caution
Caution
Caution
Caution
Caution
Warning

User Manual of CIC-D100 Ion Chromatograph
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● Safety signs
The following safety signs appear on the labels of the cabinet or components of
CIC-D100 Ion Chromatograph.
～AC
Grounding
Power on
Power off
● Ultra-pure water index
Technical indicators
Resistivity ≥18.25 MΩ·cm
TOC <10 ppb
Metal ion <1 ppb
Pyrogens <0.03 Eu/mL
Particulate matter (> 0.2μm) <1 unit/mL
Silica gel <10 ppb
Bacteria <1 cfu/mL
丨
○

User Manual of CIC-D100 Ion Chromatograph
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1 Instrument Introduction
1.1 Front panel of the instrument
The front panel of CIC-D100 Ion Chromatograph is shown in Figure 1-1.
Figure 1-1 Front panel of the instrument
Injection valve
The injection valve is a six-way valve made of stainless steel. The sample to be analyzed is
manually injected into the quantitative loop through the injection port by a injector. See section
2.2 for more information on injection valve. If automatic sample injection is required, it is
necessary to connect the automatic sampler. For more information about the automatic sampler,
see section 4.6.
Corporate logo
Injection valve

User Manual of CIC-D100 Ion Chromatograph
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1.2 Top cover of the instrument
Figure 1-2 Diagram of the top cover of the instrument
1.3 Component panel of the instrument
Figure 1-3 Instrument assembly panel
Pump display
The pump display shows the pressure and flow rate when the system is running.
Pressure sensor
Conductiv
ity cell
Pump display
Exhaust valve
Suppressor
column
heater
Pump head
Pipeline
passage
Location of
eluent bottle

User Manual of CIC-D100 Ion Chromatograph
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The pressure sensor is located at the rear end of the exhaust valve and senses the pressure of
the flow path system. The value can be read from the pump display screen.
Pump head
CIC-D100 adopts double-plunger high hydraulic infusion pump. The flow rate can be set at
0.001 mL/min to 9.999 mL/min. However, to achieve optimal performance, the general flow rate
is set at 0.200 mL/min to 2.000 mL/min. The infusion pump has high and low pressure
protection function. Please refer to section 2.1 for more information about the pump.
Column heater
It is used to heat the protective column and chromatographic column, the temperature can
be adjusted between 5℃and 45℃. The specific setting temperature is subject to the operating
temperature of the chromatographic column you have configured. The heater has built-in eluent
preheating module. The eluent entering the chromatographic column is preheated to reduce
thermal shock and thus improve the thermostatic effect in the chromatographic column.
Conductivity cell
The conductivity cell detects the conductivity of ions flowing through the cell body.
CIC-D100 Ion Chromatograph is equipped with thermostatic bipolar conductivity detector.
The tank body contains a heat exchanger, and the temperature of the detector can be adjusted
within the range of 5℃to 60℃.Please refer to section 2.4 for details.
Suppressor
The suppressor can reduce the background conductance of eluent and improve the signal
value of ions to be detected, thus obtaining ideal detection results. Please refer to section 2.6 for
details.

User Manual of CIC-D100 Ion Chromatograph
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1.4 Rear panel of the instrument
Figure 1-4 Rear panel of the instrument
Trigger port
The trigger port connects the instrument with the automatic sampler through a trigger line
which triggers the working software to start sampling.
Data line port
The data line port connects the instrument with the computer through the data line, and
outputs the signal detected by the ion chromatograph to the working software.
Power cord port
One end of the power cord is connected to the instrument and the other end is plugged into
an AC power outlet.
：This power cord is used as the main device to cut off the power supply of the
instrument. Ensure that the socket is located near the instrument and easy to insert. Please
pay attention to grounding.
Power switch
The power switch provides switch control of the instrument power supply.
Trigger port
Data line port
Power cord port
Power switch
Caution

User Manual of CIC-D100 Ion Chromatograph
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2 Instrument Components
2.1 Infusion pump
The infusion pump equipped for this instrument is an intelligent high-pressure
constant-current infusion pump with a built-in micro flow pressure sensor to monitor the flow in
real time; it has intelligent pressure limiting function to effectively protect chromatographic
columns; it is matched with the latest pulse decrement technology, providing high stability and
low pulsation to meet various applications of ion chromatography; it has a chemically inert
non-metallic undamped pump head connecting to a full PEEK pipeline. It is suitable for eluent
with a pH of 0 to 14 and reverse-phase organic solvent; it has high stability and repeatability; its
built-in chip can adjust the flow stability according to the pressure change. It has the functions of
overpressure automatic alarm, self-stop of pump and self-protection. The pressure setting can be
performed on the reverse control software.
2.1.1 Pressure sensor
The pump head conveys the eluent through a pressure sensor which detects the pressure of
the system flow path in real time. Observe whether the system pressure is stable and accurate
through the value displayed on the pump screen. The system pressure should be kept consistent
(the difference between early reading and later reading should be less than 0.5MPa).
2.1.2 Exhaust valve
When the system needs to exhaust, turn the exhaust valve counterclockwise for 1 turn to
open the exhaust valve. After the exhaust valve is opened, the eluent in the flow path will flow
here and be discharged. When the gas entering the pump is to be exhausted, the exhaust valve
can be opened. Use the exhaust needle tube to extract the gas. After the exhaust, tighten the
exhaust valve clockwise.

User Manual of CIC-D100 Ion Chromatograph
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2.2 Injection valve
CIC-D100 adopts manual injector and six-way manual injection valve for manual injection.
There are two positions in the Injection valve: LOAD and INJECT. During injection, the eluent
flows through the injection valve into the chromatographic column by the pump, and does not
pass through the quantitative loop. But the sample is injected into the quantitative loop and
stored until analysis, and the surplus sample is emptied from the waste liquid pipe. During
analysis, the eluent enters the quantitative loop and brings the sample into the chromatographic
column for analysis.
The specific circulation sequence is shown in Figure 2-1:
Load position Inject position
Figure 2-1 Working principle of six-way valve
2.3 Column heater
The column heater provides a constant temperature environment for the protection column
and the separation column, and the temperature can be adjusted between 5℃and 45℃. The
optimal setting temperature should be 5℃above room temperature or subject to the column
specification selected. A pre-column eluent preheating module is contained in the column heater,
so that the test sample can be heated uniformly before entering the chromatographic column,
thereby reducing peak diffusion and peak broadening, improving the separation degree and
making the peak shape symmetrical.
Pump Pump
Valve
Valve
Sample
injector
Quantitative loop Quantitative loop
Chromatographic column Chromato
g
ra
p
hic column

User Manual of CIC-D100 Ion Chromatograph
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2.4 Conductivity cell
The conductivity cell can quantitatively detect the target ions separated by the
chromatographic column. CIC-D100 Ion Chromatograph is equipped with constant temperature
bipolar conductivity cell. The cell body contains a heat exchanger, and the temperature of the
conductivity cell can be adjusted in the range of 5℃to 60℃. The optimal setting temperature
should be 5℃above room temperature or subject to column report.
Advantages of constant temperature bipolar conductivity cell:
(1) Excellent precision and linearity, wide working range;
(2) Small dead volume and extremely low diffusion;
(3) The interference of electrode polarization and electric double layer is well eliminated,
and the influence of electrode pollution on sensitivity is reduced.
(4) In the conductivity detection system, the suppressor effectively reduces the background
conductivity value of the eluent, and the constant temperature of the conductivity cell further
reduces the influence of temperature on conductivity and improves the stability of the baseline.
:Please turn off the heating button of the conductivity cell and the power
switch of the instrument before plugging and unplugging the conductivity cell to avoid the
damage to the circuit board.
2.5 Ampere detector (optional)
Ampere detectors are commonly used to analyze ions which are difficult to detect with
conductivity detectors and have electrical activity and low dissociation degree. Ampere detector
is shown in Figure 2-2 and Figure 2-3.
Warning

User Manual of CIC-D100 Ion Chromatograph
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Figure 2-2 Appearance and internal structure of DC ampere detector
Figure 2-3 Rear interface of the instrument
Ampere detector consists of potentiostat and detection cell.
The amperometric cell is a three-electrode volt-amperometric detection cell consisting of a
titanium counter electrode, a working electrode and a reference electrode. Thin-layer flow design
is adopted so that the smooth electrode surface can reduce flow noise.
According to the analysis, Au, Ag, Pt and GC electrodes can be selected as working
electrodes which are respectively suitable for analysis of different substances.
The reference electrode usually uses Ag/AgC1 or saturated calomel electrode.
The counter electrode is made of gold, platinum, glassy carbon, titanium, stainless steel, etc.
The reference electrode and the counter electrode should be placed downstream of the
working electrode to prevent the leak of reaction products of the electrode and the reference
electrode from interfering with the working electrode.
The electrochemical detector supports three operating modes according to different applied
potentials: direct current ampere (DC), integral ampere (including pulse ampere) and cyclic
voltammetry.
D.C. ampere detection: D.C. ampere detection is to continuously apply potential to the
working electrode.
Switch button
Power cord port Data line port Trigger port

User Manual of CIC-D100 Ion Chromatograph
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Integral and pulsed amperometric detection: integral and pulsed amperometric detection is to
apply a series of continuously changing potentials in one cycle and is repeated, so that the
electrode surface can be continuously regenerated.
Cyclic voltammetric amperometric detection: this method controls the potential to scan
repeatedly at different rates and with triangular waveform for one or more times over time,
resulting in redox reaction on the surface of the working electrode.
2.6 Suppressor
The suppressor can reduce the background conductance of eluent and improve the signal
value of ions to be tested, thus improving the testing capability of ion chromatograph. The
operation principle of suppressor is shown in Figure 2-4. After use, the residual inorganic salts in
the suppressor should be flushed with ultrapure water for 10 min(1mL/min). Then, the four
interfaces should be plugged with plugs. The suppressor should be sealed for preservation. Water
infiltration should be conducted every one to two weeks, otherwise the suppressor will have high
pressure inside or leak liquid.
Figure 2-4 Schematic diagram of the suppressor’s working principle
Anions in Samples
Cations in Samples
Working principle of the suppressor (Anion)
Pure water or liquid from the
detector
Cation exchange membrane
To detector
Liquid waste
电极
Electrode
Sample, eluent
Liquid waste
Electrode
Cation exchange membrane