Anion analysis in ionic chromatography, titrimetry, ICP-OES and ICP-MS is often complicated by the relatively high detection limit, for example for the analysis of iodine in food products, selenium in biology and in the environment or chlorine in petrochemistry. MRT cartridges allow concentration of these analytes, improving the performances of the analytical method.

Note: In the case where the analyst wants to determine separately the concentrations of different analytes retained on a cartridge, it is possible to play with the chemical affinity to proceed to a selective elution.