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Application of Ion Chromatography in Water Quality Analysis

Application of Ion Chromatography in Water Quality Analysis

Overview of ion chromatography

The analysis of the principle of ion chromatography and its technical advantages will help relevant staff to change their thinking, deeply realize the necessity and feasibility of the application of ion chromatography, and create conditions for the subsequent application of this technology in water quality analysis.

Principles of Ion Chromatography Technology

Ion chromatography relies on the basic principles of electrochemistry and photochemistry to complete the separation of specific ions by changing the interaction between ions and ions. In the long-term development process, ion chromatography has formed three types of chromatograms, namely high-efficiency ions. Exchange chromatography, ion pair chromatography, ion exclusion chromatography. The three chromatographic mechanisms are different and are suitable for different inspection scenarios. High-efficiency ion exchange chromatography mainly achieves the purpose of ion separation through mutual exchange of ions. Ion pair chromatography mainly focuses on ion formation and adsorption principles to separate ions. Ion exclusion chromatography mainly uses the mutual repulsion between ions to separate ions. The application of ion chromatography in water quality analysis can complete the separation of hydrophilic anions and cations and various impurity ions, and realize effective judgment of water quality.

Advantage analysis of ion chromatography

Compared with traditional water quality analysis methods, ion chromatography has certain advantages. Not only is the operation difficulty low, it has strong selectivity, and can flexibly analyze specific substances according to needs. The inspection speed is faster, the cycle is shorter, and the accuracy of the detection results is higher. At the same time, ion chromatography can also complete the rapid detection of different ions at the same time, and has strong anti-interference ability and environmental protection properties. During the detection process, it will not affect the external environment. It is precisely based on this advantage that ion chromatography is widely used in environmental testing, medical testing, water quality analysis and other fields, especially in the application of water quality analysis. In the traditional water quality analysis link, due to the There are differences in the types of ions, so a lot of resources need to be spent in chemical testing and instrument testing. The preparation of testing instruments and testing agents is costly and the detection and analysis results are not obvious. The application of ion chromatography in the water quality analysis link can effectively solve the above-mentioned problems. Under the premise of ensuring the water quality analysis effect, the detection cost is reduced and additional expenses are avoided. Based on the advantages shown by ion chromatography in water quality analysis, the application of this technology should be discussed, and a complete and efficient water quality analysis mechanism should be constructed.

Analysis on the Application of Ion Chromatography in Water Quality Analysis

When ion chromatography is used in water quality analysis, it is necessary to scientifically select the eluent. The main function of this eluent is to separate harmful ionic substances in the water to be tested. The quality of the eluent is important. Carry out strict checks. Ensure that the affinity of the resin to the eluent is neither too large nor too small, and this affinity must be kept moderate. Because in the water quality testing test, the concentration of the eluent will directly affect the dewashing ability of the test. The change in the concentration of this eluent will not only affect the dewashing ability, but also have a certain effect on the pH value detection result in the test. The impact of chromatographic ion detection results data errors. Therefore, in order to avoid the above situation, ensure the detection accuracy of chromatographic ion detection technology, and reduce the interference of other detection factors, two commonly used buffer eluents, NaHCO3 mixed dilute solution and NaOH dilute solution are usually used in the detection.

In the detection of drinking water quality, ion chromatography can detect a variety of harmful substances and chemical ions that cannot be observed with the naked eye. During the detection, a certain detection process must be followed to scientifically determine the inorganic anions and cations in the water quality. From the actual detection process, the use of ion chromatography for detection greatly increases the detection limit and detection time of drinking water, and the entire data analysis and scientific detection of alkali metal ions and alkaline earth metal ions are carried out by experimental comparison during the detection process. Judge the harmful chemical components in drinking water.
In addition, ion chromatography can be combined with the traditional water quality detection method EDTA-2Na technology to effectively detect the total hardness data in the water quality. Therefore, the ion chromatography can not only effectively detect the calcium ion and magnesium in the water quality in the water quality detection. Chemical components such as ions, and these detection technologies can scientifically detect metal-plated ions in water. Therefore, the chromatographic ion detection method is more convenient and efficient for pure water detection, because daily drinking water contains a large amount of disinfectant in order to remove pathogenic microorganisms and other types of harmful chemicals in the water in time, but this disinfectant There are also certain side effects that affect the physical and mental health of the human body, resulting in a lot of disinfection residues in the drinking water, such as disinfection products such as halogen acetic acid disinfection by-products and halogen oxyacids. Because certain disinfection residues will cause the water quality to deteriorate, and under certain conditions, a variety of carcinogens will be formed, which will have a greater impact on humans.
Under the above circumstances, ion chromatography has another function that can effectively determine the disinfection by-products in water quality. The usual drinking water contains a large amount of halides, and ion chromatography can also be used for rapid detection. The application of this detection technology is very extensive, and it is understood that it has been widely used in the United States. In addition, the use of ion chromatography can also be used to detect various anions and haloacetic acids in our daily drinking water. This detection method has a certain innovative practicality and has been proved to be a very good method after extensive application. The detection method; another detection method is the technical detection of organic pollution in the water body through ion chromatography. Because the perchloric acid in the water body will cause certain adverse effects on the human body’s thyroid secretion, the ion chromatography method is used for drinking water. The detection has become a major current application technology; in addition, ion chromatography can also be used to detect other pollutants in the environment. For example, the detection of harmful substances such as aniline compounds can be combined with chromatographic ion detection and gradients can be used. The method of leaching is used for technical auxiliary operation detection, so that harmful chemical substances and the water body can be separated quickly.

Discussion on the Application and Research Progress of Ion Chromatography in Water Quality Analysis

Through the above analysis, it can be known that ion chromatography has a very wide range of application value in the water quality detection and analysis of our country. In the detection of water disinfection products and harmful residues of common agricultural substances, on the one hand, the detection efficiency is higher than traditional detection techniques, especially the processing of test samples is very convenient, on the other hand, it can save a lot of economic costs for the inspectors. Therefore, in view of the application of these detections, China’s ion chromatography detection technology is a very ideal application-based technical method for the analysis and detection of water quality. The detection application effect has reached the expected purpose. With the continuous improvement of technology, the country will invest more and more funds and talents in water quality analysis and testing. On this basis, with the continuous innovation and development of separation technology and ion chromatography detection technology, more and more people will be living The technology is widely used in the field of technology, and exerts greater value in the economic and social development of our country.


With the rapid development of science and technology in our country, more and more methods are used in water quality analysis. Ion chromatography is a commonly used water quality detection method today. Ion chromatography has the advantages of fast, sensitive, simple operation, good selectivity and simultaneous determination of multiple components, avoiding the classic volumetric method, gravimetric method and photometric method. The steps are tedious and time-consuming, require a variety of chemical reagents, have low sensitivity and have the disadvantage of interference, and are widely used for this purpose.



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