Cation chromatography inorganic ions

The nature of the surface of alumina is important in its application as an adsorbent for chromatography. This subject is covered by special literature. Inorganic ions can be separated on alumina as well as on silica (241). Anions are adsorbed together with bivalent cations, but not together with univalent cations indicating, again, equimolecular... 

Ion-exchange chromatography is a liquid chromatography application that allows the separation of cationic and anionic species. Ion chromatography, a technique used for the separation of dissolved inorganic ions, is employed in EPA Methods 9056 and... 

Ion-exchange chromatography has many clinical applications, including the separation of amino acids, peptides, proteins, nucleotides, oligonucleotides, and nucleic acids. Another important application of ion-exchange chromatography is the separation and removal of inorganic ions from aqueous mixtures. Thus most water purification units used to prepare deionized water for the laboratory contain "mixed-bed columns of cation and anion resins (see Chapter 1). 

While most other types of chromatography are used principally for separations of complex organic substances, ion exchange chromatography is particularly well suited for the separation of inorganic ions, both cations and anions, because the separation is based on exchange of ions in the stationary phase. It has also proved to be extremely useful for the separation of amino acids. 

Water, wastewater, and soil and air pollution analyses are the most important part of environmental analysis. Determination of common inorganic anions and cations is mandatory. Ion chromatography has almost replaced most of the wet chemical methods used in water analysis. This entry is a review of application of ion chromatography to environmental research. 

In the range of environmental applications of ion chromatography, inorganic anions are, by far, the most important. The primary reason for this is the lack of alternative methods for anion analysis, which is not the case for cation analysis where many other instrumental techniques are readily available [e.g., atomic absorption spectrometry (AAS) inductively coupled plasma-atomic emission spectrometry (ICP-AES) and ICP-mass spectrometry (ICP-MS)]. 

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