PITTCON 08 Oral Session
Advantages of multidimensional ion chromatography for trace analysis
Session Number 830-7
Abstract
Multidimensional chromatography techniques are extremely powerful tools for solving demanding separation problems. These days they gain interest in all fields of chromatography. Ionic standards have to comply with the highest purity requirements. For the preparation of such standards it is of paramount importance to quantify impurities in the feedstock used. However, the main component of the solution (typical concentration 10 g/L) produces an extremely broad peak with a tremendous tailing. All ions with higher retention times are affected by the elution behavior of the main component. Either they are hardly detectable under the peak tail of the main component, or they elute as ill-defined humps on top of a drifting baseline. All this adversely affects the limit of detection and the precision of the determination. This presentation highlights the advantages of multidimensional ion chromatography (IC) techniques in typical trace analyses. While classical approaches in multidimensional separations involve the use of different columns and detectors, we will present a technique that can be performed with any ion chromatograph with almost no additional equipment.
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