Reagent-free ion chromatography is mainly based on the principle of ion exchange chromatography.
Reagent-free ion chromatography is mainly based on the principle of ion exchange chromatography. The core component of its instrument is filled with resin with specific functional bases, which can undergo reversible exchange reaction with ions in the solution. After the sample enters the ion exchange column, the retention time of different ions in the column is different due to different affinity with the resin, thereby achieving separation. The separated ions are carried out by the eluent onto the column, and when passed through the detector, they are converted into electrical signals or other measurable signals, and chromatograms and analysis reports are generated by the data processing system.
The "reagent-free" characteristics of this method mainly stem from the leachate generator technology. Taking the common hydroxide system as an example, through electrochemical reactions, the instrument can produce the required concentration of hydroxide leaching liquid online by simply passing pure water, achieving isometric or gradient elution, eliminating the cumbersome operation of manual preparation of leaching liquid and avoiding the test error caused by human factors.
Built-in leachate generator: For example, CIC - D160+ ion chromatograph can generate hydroxide system leachate online, achieving isometric or gradient elution, which is simple to operate and has high automation; CIC - D300+ ion chromatograph has built-in double-membrane leachate generator, which uses electrolysis to generate high-purity KOH and MSA leachate. The H⁺ or OH⁻ generated from electrolysis can be used to generate acidic or alkaline leachate online, which saves time for manual leachate, improves work efficiency, and avoids the errors that may occur in manual leachate.
Built-in low-pressure degassing module: can remove bubble interference in the leachate and make the test more stable.
Bipolar conductivity detection technology: high detection accuracy and excellent performance under low background conductivity, which can improve detection accuracy and sensitivity.
Multiple detector configurations: CIC - D500+ ion chromatograph is equipped with conductance detector, electrochemical detector, and ultraviolet detector. It can be switched freely between three detectors to realize the detection of a variety of ions and compounds, and meet the detection needs of different industries and fields.
CIC-D160+ Ion Chromatography
Using a bipolar constant temperature conductance detector, it can take into account the detection of multiple ions with four orders of magnitude difference in the sample.
CIC-D300+Ion Chromatography
Based on the principle of ion exchange, the CIC-D300+ ion chromatograph separates the ion components in the sample through a chromatographic column and uses a detector (such as a conductance detector) to determine the ion concentration.
CIC-D500+ ion chromatograph, as a new multi-functional ion chromatograph system, realizes the modularization of key components such as infusion pump, eluent generator, column oven, conductivity detector, suppressor, etc.
Advantages
Easy to operate: no manual preparation of leachate is required, which reduces tedious reagent preparation, reduces operation difficulty, and improves the degree of automation of analysis.
Green and environmentally friendly: Only pure water is needed as raw material to produce leachate, avoiding the use of a large amount of chemical reagents, reducing the generation of chemical waste, and in line with environmental protection concepts.
Accurate analysis: The intelligent control method can realize the custom setting of leachate concentration, and can complete the gradient elution separation operation of complex samples, further improving the accuracy of analysis. At the same time, the instrument has high detection accuracy and good stability, and can provide reliable analysis results.
