Chelation ion chromatography of metal ions using high performance substrates dynamically modified with heterocyclic carboxylic acids

Shaw, Matthew J.; Hill, Steve J.; Jones, Phil

doi:10.1016/s0003-2670(99)00495-x

Cited by 33 publications

(18 citation statements)

References 19 publications

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“…Using this column, U(VI) was successfully separated from Fe(III), La(III) and Th(IV), which illustrated the potential of dynamic modification using dipicolinic acid as a tool for the separation and determination of U(VI) in complex matrices. Recently we reported results using a standard low crosslinked polystyrene polymer dynamically coated with dipicolinic acid, which also displayed promising properties for separating uranium from other metal ions [20]. This preliminary study indicated that the dynamically coated column produced a special selectivity for uranium, being well separated from all the other common metal ions, and thus showed potential for the analysis of environmental samples.…”

Section: Introductionmentioning

confidence: 85%

Determination of uranium in environmental matrices by chelation ion chromatography using a high performance substrate dynamically modified with 2,6-pyridinedicarboxylic acid

et al. 2000

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SummaryChelation ion chromatography, involving a high efficiency neutral polystyrene-divinylbenzene resin dynamically coated with 2,6-pyridinedicarboxylic acid, has been developed as a novel technique for the quantitative determination of uranium in complex matrices. An isocratic separation method, using an eluent consisting of 1M KNO3, 0.5M HNO3 and 0. lmM 2,6-pyridinedicarboxylic acid, allowed the uranyl ion to elute away from matrix interferences in under ten minutes. Detection was achieved using an Arsenazo III post column reaction system. Good recoveries were obtained from spiked mineral water and sea water and the standard addition curves produced good linearity (r 2 > 0.997) with a detection limit, calculated as twice baseline noise, of 20 #g L -1. The procedure was applied to the determination of trace uranium in standard reference water and sediment samples. The results obtained compared well with the certified values for uranium.

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Section: Introductionmentioning

confidence: 85%

Determination of uranium in environmental matrices by chelation ion chromatography using a high performance substrate dynamically modified with 2,6-pyridinedicarboxylic acid

et al. 2000

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“…Usually, this type of modification works quite well for the big group of dyes containing several aromatic rings in a molecule [13,15,46]. The bulk molecules of organic dyes such as aurin tricarboxylic acid [47] or quinaldic acid [48] are strongly retained at the surface of PS-DVB microspherical particles due to combination of hydrophobic and p -p interactions. The selectivity of adsorbed organic dyes remains unchanged after adsorption but separation efficiency is usually not too high because of the low conformational mobility of adsorbed molecules.…”

Section: Impregnated and Dynamically Loaded Substratesmentioning

confidence: 99%

Recent developments in the high‐performance chelation ion chromatography of trace metals

Nesterenko¹,

Jones

2007

J of Separation Science

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Review Recent developments in the high-performance chelation ion chromatography of trace metalsThere have been a number of significant developments in the high-performance chelation ion chromatography (HPCIC) of trace metals in recent years. This review focuses on these developments, while giving important information on the fundamental parameters controlling the chelation sorption mechanism, including type of chelating group, stability constants, kinetics, and column temperature. The discussion pays particular attention to the types and properties of efficient chelating stationary phases which have been fabricated for certain groups of metals. The review also describes a number of major improvements in postcolumn reaction detection including the use of the latest reagents and noise reduction strategies to improve sensitivity and reduce LOD. In the final section, an indication of the applicability of HPCIC to a range of complex sample types is given with some key examples and chromatograms using the latest high-efficiency chelating phases.

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“…Stationary phases obtained by physical adsorption of chelating reagents on the surface of high-performance reversed-phase substrates are especially versatile. [20][21][22][23][24][25] Continuous supply from the mobile phase is necessary for reagents of less lipophilicity (dynamic coating), [22][23][24][25] while durable coating is possible for highly lipophilic reagents (precoating). [20][21][22][23] In this study, we have synthesized a series of azo reagents with and without a long alkyl chain which enhanced the distribution of the reagent into the stationary phase and have evaluated their performances as a precoating reagent on an octadecylsilyl column for the separation of manganese, zinc, and cadmium ions.…”

Section: Introductionmentioning

confidence: 99%

Bidentate and Tridentate Heterocyclic Azo Compounds Having Long Alkyl Chains as Coating Reagents for Ion Chromatography of Manganese, Zinc, and Cadmium Ions

et al. 2007

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Bidentate and tridentate heterocyclic azo compounds with and without a long alkyl chain were prepared and examined for cation exchange chromatography of manganese, zinc, and cadmium; these ions could not be separated by reversed phase HPLC following precolumn derivatization with heterocyclic azo compounds owing to the dissociation of the complexes. The newly prepared azo compounds having a long alkyl chain favorably orientate in the reversed-phase stationary phase such that the coordinating parts of the ligand may make contact with metal ions in the mobile phase. Bidentate ligands showed sharp peaks but almost no resolution of manganese and cadmium. A tridentate ligand strongly retained all the three metal ions, which could be separated within 10 min by a competing ligand and by optimizing the pH.

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Chelation ion chromatography of metal ions using high performance substrates dynamically modified with heterocyclic carboxylic acids

Cited by 33 publications

References 19 publications

Determination of uranium in environmental matrices by chelation ion chromatography using a high performance substrate dynamically modified with 2,6-pyridinedicarboxylic acid

Determination of uranium in environmental matrices by chelation ion chromatography using a high performance substrate dynamically modified with 2,6-pyridinedicarboxylic acid

Recent developments in the high‐performance chelation ion chromatography of trace metals

Bidentate and Tridentate Heterocyclic Azo Compounds Having Long Alkyl Chains as Coating Reagents for Ion Chromatography of Manganese, Zinc, and Cadmium Ions

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