Ligand-exchange high-performance liquid chromatography of dialkyl sulfides

Takayanagi, Hiroaki; Hatano, Osamu.; Fujimura, Kazumi; Ando, Teiichi

doi:10.1021/ac00286a013

Cited by 24 publications

(2 citation statements)

References 41 publications

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“…Since the early publications on ligand exchange (Stokes and Walton, 1954;Helfferich, 1961Helfferich, , 1962a, the differences in ligand complex-strengths with metal ions are widely used to separate a large range of organic compounds (Walton, 1973;Navratil et al, 1975;Davankov and Semechkin, 1977;Takayanagi et al, 1985;Kato et al, 1986;Nielen et al, 1987;Matejka and Weber, 1990;Sud et al, 1992). Here the performance of the (fixed) metals consists of the very selective attraction of specific organic compounds, by which ion exchange and co-ordination chemistry are combined.…”

Section: Introductionmentioning

confidence: 99%

Effects of cadmium on the behaviour of citric acid in isolated tomato xylem cell walls

et al. 1994

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Effects of cadmium on the sorption of citric acid in isolated xylem cell walls were Investigated. 2.5 nM to 9.5 mM [1.5-14 C]citric acid solutions were perfused through columns of xylem cell wall material, isolated from tomato plants (Lycoperslcon esculentum Mill, cv. Tiny Tim).The anion exchange potential of the column was estimated by amino acid analysis as approximately 46 meq dm" 3 , whereas the apparent anion exchange capacity (A£C) was estimated as 1.65 + 0.18 10 "M (citric acid units). This low AEC was attributed to a 'zipper' effect, a mutual screening of fixed R" and A + charges.Pre-loading with 11s Cd 2+ did not affect citric acid sorption, indicating the absence of Cd-effects on the availability of fixed A + charges, and the absence of the formation of effective R~-Cd 2+ and Donnan free space (DFS) [Cd(cit)HJ + complexes.Simultaneous application of both citric acid and 11B Cd 2+ , ""Ca^, or ^Mg 2 * resulted in increased sorption of citric acid, probably due to capacityimprovement rather than changes in valence-dependent anion sorption; this may be due to the presence of bulk [M(cit)]", held in the column as [M(cit)HJ + after protonation in the DFS. Sorption of citric acid was greatest in the presence of Ca 2+ , which was discussed in the light of the differences between Ca, Cd and Mg in their characteristics as co-ordinative M-complexes of citric acid. The overall results indicate the potential importance of the presence of metal ions for the xylem transport behaviour of organic acids in plants.

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Section: Introductionmentioning

confidence: 99%

Effects of cadmium on the behaviour of citric acid in isolated tomato xylem cell walls

et al. 1994

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“…In liquid phase chromatography, considerable effort has been devoted to the modification of stationary phases with immobilized transition metal ions, in order to exploit coordinative interactions in the separation of analytes containing heteroatoms or π‐electron systems. Transition metal ions are immobilized either by direct interaction with the stationary phase11–13 or by complexation with ligands bonded to the stationary phase 14–19. This type of chromatography, often referred to as “ligand exchange chromatography”, has been successfully demonstrated in the separation of compounds such as amines,13–17 sulfur compounds,19 phenols,18 or polycyclic aromatics 11,12…”

Section: Introductionmentioning

confidence: 99%

Silica–MOF Composites as a Stationary Phase in Liquid Chromatography

et al. 2010

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Metal-organic framework materials (MOFs) are a class of microporous and crystalline materials with great potential for adsorption-based separations. Harnessing the separation ability of these materials in high-performance liquid chromatography (HPLC) requires the use of small and uniform particles in order to achieve good column packing. The well-known MOF material [Cu 3 (BTC) 2 ] is, however, typically synthesized as a polydisperse mixture due to its nucleation

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Chelating Resins in Analytical Chemistry

Liu

1989

J Chinese Chemical Soc

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Chelating resins, the polymeric complexing compounds, are specific and selective ion exchange resins. A chelating ion exchange resin consists essentially of two components, i.e. a chelating group and a polymeric matrix. The properties of both components affect the selectivity of the synthesized resin. Methods used to synthesize chelating resins are reviewed. The analytical and physical techniques used to characterize the dissociation constant, metal capacity and distribution coefficient of the newly synthesized resin as well as the coordination site, the composition and the formation constant of the metal‐resin complexes are discussed. Chelating resins could be used in various forms. Some important features of the analytical application of chelating resins, including selective concentration and separation both in inorganic analysis and organic analysis are also discussed. The techniques by which sorption or separation with the help of chelating resins achieved can be static, dynamic, or chromatographic. After sorptive concentration or separation, the elements can be determined either directly in the sorbent phase, its decomposition residue, the eluent solution after desorption, or the effluent after the solution has been passed through the sorbent. Various objects such as natural waters, geological objects, industrial materials, foodstuffs, coal, fuel oil. shale oil, transuranium elements and biological materials could be analyzed with the help of chelating resins.

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Ligand-exchange high-performance liquid chromatography of dialkyl sulfides

Cited by 24 publications

References 41 publications

Effects of cadmium on the behaviour of citric acid in isolated tomato xylem cell walls

Effects of cadmium on the behaviour of citric acid in isolated tomato xylem cell walls

Silica–MOF Composites as a Stationary Phase in Liquid Chromatography

Chelating Resins in Analytical Chemistry

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