Analysis of Inorganic Cations

While alkali- and alkaline-earth metals can also be rapidly and very sensitively detected by other instrumental analysis methods, the advantage of ion chromatography lies in its ability to simultaneously detect the ammonium ion. In copper pyrophosphate baths, for example, the addition of ammonia improves the plating evenness. However, because the ammonia concentration continuously decreases 

Ion chromatography provides an alternative to atom spectrometric methods for the determination of transition metals. Its main advantage is the simultaneity of the procedure and the ability to distinguish between different oxidation states. For example, the determination of iron(III), copper, and zinc in a chromic acid bath (Fig. 9-108) can be performed free of interferences despite the high chro-mium(VI) load. The two oxidation states of iron can be clearly distinguished via ion chromatography. 

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Weston, A., Brown, P. R., Jandik, P., Heckenberg, A. L., and Jones, W. R., Optimization of detection sensitivity in the analysis of inorganic cations by capillary ion electrophoresis using indirect photometric detection,. Chromatogr., 608, 395, 1992. 

Figure 10.409 Analysis of inorganic cations in an automatically diluted fracking flow-back wastewater. Separator column lonPac CS16 with guard column column dimensions ...

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