1. Product introduction

Ion chromatography is a kind of high performance liquid chromatography, so it is also called high performance ion chromatography (HPIC) or modern ion chromatography. Ion chromatography is mainly used for the analysis of environmental samples, including anions and cations in samples such as surface water, drinking water, rainwater, domestic sewage and industrial wastewater, acid sediments and atmospheric particles, and traces in water and reagents related to the microelectronics industry Analysis of quantitative impurities. Therefore, it is widely used in tap water, environmental monitoring, quality inspection, petrochemical, geological exploration and other fields.

2. Product parameters

1. Performance indicators:

(1) Detection types of inorganic anions: F-, Cl-, NO2-, PO43-, Br-, SO42-, NO3-, ClO2-, BrO3-, ClO3-

Inorganic cation detection types: Li+, Na+, NH4+, K+, Ca2+, Mg2+, Sr2+, Ba2+

(2) With constant temperature system.

(3) The instrument operating system is completed by one key of the mouse, with functions such as automatic range selection, automatic zero adjustment, and current setting.

(4) In the large-screen program of the instrument, there is a small workstation to display the spectral processing data and save the spectral data.

(5) Realize the integration of conductivity detector, injection valve, high-pressure advection pump, workstation, constant temperature system and other components. Equipped with a cation separation column, anion and cation analysis can be completed in time. Users can choose according to their needs.

2. Conductivity detector:

(1) Pentapole conductivity cell: The electrode adopts annular passivated 316 stainless steel electrode, the cell volume: <0.8ul, which can effectively overcome the phenomenon of electrode polarization. It has the characteristics of low noise and high detection sensitivity. With electronic constant temperature and temperature compensation device, constant temperature accuracy 5-65℃, temperature compensation (1.7%-2.0%)/℃

(2) Conductivity detection full range: 0-50000uS, detection range: 0-35000uS, adjustable, with manual and automatic selection function.

(3) Full-scale detection resolution: not less than 1/40000 (≤0.0020ns/cm)

(4) Output voltage: -6000mv～+6000mv Auto-zero range: -6000mv～+6000mv

(5) Suppressor constant current source current: 0-150mA, increment 1mA, set by the user on the screen.

3. High pressure advection pump:

This machine is a microprocessor-controlled double-piston reciprocating pump, which adopts advanced intelligent control algorithm, which can reduce the flow pulsation of the pump to a low level.

(1) Withstand pressure test: ≥36MPa (subject to JJG823-2014 "Measurement and Verification Regulations for Ion Chromatography Instruments", and provide the type evaluation report, type approval certificate for measuring instruments and measuring instrument license issued in accordance with this regulation)

(2) Flow range: 0.001ml/min～9.999ml/min

(3) Flow accuracy: RSD＜0.1% (measured at 1ml/min)

(4) Flow repeatability error: <0.1%

(5) Pressure sensor: the pressure display accuracy is 0.1MPa

(6) Overpressure protection: When the working pressure exceeds or falls below the set upper or lower limit, the pump will automatically shut down and alarm.

4. Flow system:

The flow path system is made of PEEK material (imported parts), which has good versatility, can use strong acid and strong alkali eluent, and is compatible with 100% organic solvents, which is convenient for users to analyze, rinse and maintain complex samples. The user can change the column and eluent at will. Avoid the pain of leakage of the flow path, so that users have no worries.

5. Suppressor:

Continuous automatic regeneration of electrochemical micro-membrane suppressor, online automatic regeneration, high suppression capacity, low background conductance, low noise, stable baseline, maintenance-free. Anti-pollution, good pressure resistance, long life, wide range of use (PH0-14). Small size, fast stabilization time, stable time not more than 12 minutes, and good reproducibility.

6. Chromatography workstation:

24-bit high-precision and high-sensitivity digital-to-analog conversion. The dedicated ion chromatography workstation can transmit digital signals to the computer through high-performance USB to complete the collection and processing of anion and cation data. It can realize the reverse control operation of the instrument, set the working parameters of the instrument online through the computer, and carry out man-machine dialogue. Automatically receive analysis and control to save instrument chromatographic conditions. Automatic identification of negative peaks and baseline subtraction. Automatic integration of parameters, automatic report generation. Automatically detect the running status of the instrument, prompt and alarm for running faults and provide protection measures for the instrument.

7. Test technical indicators: 

(subject to JJG823-2014 "Ion Chromatograph Metrological Verification Regulations", and provide the type evaluation report, measuring instrument type approval certificate and measuring instrument license issued according to this regulation)

7.1 Lower detection limit:

7.1.1 Cl-≤0.005μg/mL (injection volume 25μL, eluent carbonate system)

7.1.2 BrO3-≤0.005μg/mL (injection volume 25μL, eluent carbonate system)

7.1.3 Li+≤0.005μg/mL (injection volume 25μL)

7.2 Linear correlation coefficient ≥ 0.999

7.3 Linear range: ≥103 (calculated as Cl-)

7.4 Baseline noise: ≤0.5%FS

7.5 Baseline drift: ≤1.5%FS

7.6 Temperature stability of column oven: ≤0.1℃/h

7.7 Qualitative repeatability≤0.5%

7.8 Quantitative repeatability≤1.5%

8. Volt-ampere (ampere) detector 

(subject to JJG823-2014 "Ion Chromatograph Metrological Verification Regulations", and provide the type evaluation report, measuring instrument type approval certificate and measuring instrument license issued in accordance with this regulation)

There are four detection methods, namely DC ampere, pulse ampere, integral ampere, differential pulse voltammetry.

The measurement of the above four methods can be completed by using the flow path method or the flow injection method, and selecting the appropriate working electrode. It is suitable for detection of anions such as bromine, iodine, sulfur, cyanide, cations such as lead, copper, zinc, cadmium, and organic substances.

Lower detection limit:

CN-≤0.001μg/mL (injection volume 25μL)

I-≤0.003μg/mL (injection volume 25μL)

Cd2+≤0.0001μg/mL (injection volume 25μL)