IONUS Ion Chromatography System for the Analysis of Anions and Cations
The IONUS Ion Chromatograph is offered in two different detection variants with regard to different applications. As standard, this is detection by conductivity (IONUS) and for special applications this detector is replaced by post-column derivatization with photometers of different wavelengths in the UV/VIS range (IONUS, Post Column Derivatization) in analogy to our amino acid analyzer ARACUS.
By default, we equip our chromatographs almost exclusively with separation columns that are rugged, reliable, and perfect for classroom projects. Our columns are name-brand and are available in Stainless Steel and PEEK. Columns from other manufacturers are available for certain special applications and on request. We also develop individual applications for you, which are specially tailored to solve your separation problem or to address a teaching opportunity.
The IONUS is suitable for the analysis of anions and cations in research, development, and everyday routine as well as for water within the scope of environmentally relevant investigations. The sample solutions are mostly water-based and may contain very weak acidic or basic solutions, or water-miscible organic solvents. A classic example is the analysis of (drinking) water according to EPA 300 Part A and B. Please note, these systems have been used in educational facilities from high schools to universities for years.
The advantage of IONUS is the compatibility with IC columns of all manufactures and it is compatible with all common eluents of anion and cation chromatography. In a standard configuration the IONUS comes without a suppressor, which is sufficient for most original non-suppressed analysis and application technique.
When applying without a suppressor technique, it is possible the chromatogram may experience negative as well as positive peaks for the individual substances or that the peak areas are very small due to very higher background conductivity.
In order to measure smaller concentration ranges in anion analysis, the instrument can be equipped with suppressor technology with chemical based regeneration.
The IONUS also can be equipped with an UV/VIS detector. In this case the external UV/VIS detector can provide a remedy by using indirect UV detection for light-absorbing eluents. Another possibility is to use non-absorbent eluents for light-absorbing sample substances. The analysis of bromate, iron speciation, hexavalent chromium, and organic acids are possible with the UV/Vis equipped IONUS.
IONUS POST COLUMN DEVIRATIZATION SYSTEM (IONUS PCD)
The IONUS Post Colum Derivatization (PCD) does not have a built-in conductivity detector. Instead, it has a reactor for derivatization followed by a single wavelength photometer. These single wavelength photometers are very sensitive compared to a variable UV/VIS detector, and it can be easily changed by the user. The choice of wavelength depends on the selected color reaction, such as for the two bromate determination according to EPA 317 or EPA 326 with 440 nm or 355 nm.
The IONUS PCD also offers the advantage that it can be used with IC columns of all manufactures and it is compatible with all common eluents of anion and cation chromatography that support post column derivatization applications such as bromate or transition metals.
IONUS Brochure: