Evaluation of 1,2-diaminocyclohexanetetraacetic acid as eluent in the determination of inorganic anions and cations by ion chromatography

Adsorption behavior of Cr(vi) from aqueous solution onto magnetic graphene oxide functionalized with 1,2-diaminocyclohexanetetraacetic acid

A novel magnetic composite adsorbent was synthesized by grafting 1,2-diaminocyclohexanetetraacetic acid to magnetic graphene oxide (DCTA/E/MGO).

Simultaneous determination of inorganic anions, calcium and magnesium by suppressed ion chromatography

Suppressed conductimetric detection ion chromatography (IC) was investigated for the separation and detection of common inorganic anions, calcium and magnesium by anion-exchange chromatography using a sodium carbonate-EDTA mobile phase. The formation of anionic Ca2+ -EDTA and Mg2+ -EDTA complexes allowed its separation from other inorganic anions opening the way for their simultaneous determination in a single chromatographic run. The effect of the pH, carbonate and EDTA concentrations in the eluent and the previous addition of EDTA to the samples has been studied. The optimised experimental conditions were applied to the determination of Ca2+ and Mg2+ in mineral waters with results in agreement with alternative ICP-MS methodologies.

Applications of anion chromatography in terrestrial environmental research

Ion chromatography can be applied to characterise single samples for a wide range of ionic species, at elevated or trace concentrations, or with automation may be used to determine many of the common ions on several thousand samples per year. It has been applied to a wide range of sample types of environmental interest. Examples of applications are given for the common sample types, i.e. atmospheric gases and particulates, water, biological materials and soil. The recent literature in the field of anion chromatography, as applied to environmental research, is reviewed (102 references). Suppressed and non-suppressed systems are covered, as are comparisons with other methods of analysis. Development of sample preparation methods, stationary and mobile phases, detection systems and techniques are also discussed.