Ion chromatography on methacrylate ion exchangers

Hradil, J.; Švec, F.; Aratskova, A. A.; Beljakova, L.D.; Орлов, В. И.; Yashin, Ya. I.

doi:10.1016/s0021-9673(01)89676-x

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…Although this requirement is very simple to achieve from the preparation point of view, it is rather difficult to synthesize these exchangers reproducibly since the standard methods used for the determination of ion exchange capacity such as titration or elemental analysis are no longer accurate in the range of very small degrees of functionalization. Use of GMA beads modified with sulfonic acid and quaternary ammonium functionalities allowed for very good separations of both anions and cations, respectively [117,118]. Figure 14 shows an example of the separation of alkali metal and ammonium cations.…”

Section: Ion Exchange Chromatographymentioning

confidence: 99%

Methacrylate‐based chromatographic media

Beneš

Horák

Švec³

2005

J of Separation Science

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This review summarizes the preparation and application of chromatographic separation media based on methacrylate monomers with a major focus on highly crosslinked macroporous beads prepared from 2-hydroxyethyl methacrylate and glycidyl methacrylate, respectively. The effects of process variables such as composition of the polymerization mixture that includes monomers, porogenic solvents, and free radical initiator, suspension stabilizer, reaction temperature, and stirring are detailed for both classical and templated suspension polymerization. In addition, specific features of the preparation of monodisperse beads are also discussed. The performance of methacrylate-based separation media is demonstrated on numerous separations in a variety of chromatographic modes.

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Section: Ion Exchange Chromatographymentioning

confidence: 99%

Methacrylate‐based chromatographic media

Beneš

Horák

Švec³

2005

J of Separation Science

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“…In the present paper, the applicability of organic polymer-based monoliths to capillary IC has been experimentally investigated. Organic polymer-based monolithic capillary columns were prepared by a two-step procedure consisting of polymerization and sulfonation of glycidyl methacrylate (GMA), , and the chromatographic performance was evaluated through the separation of a model mixture of common cations. In addition, some promising results of flow rate gradient separation and direct injection determination are presented.…”

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confidence: 99%

Preparation and Application of Methacrylate-Based Cation-Exchange Monolithic Columns for Capillary Ion Chromatography

et al. 2004

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Polymer-based strong cation-exchange monolithic capillary columns with different capacities were constructed for ion chromatography by radical polymerization of glycidyl methacrylate (GMA) and ethylene dimethacrylate in a 250-microm-i.d. fused-silica capillary and its subsequent sulfonation based on ring opening of epoxides with 1 M Na(2)SO(3). The cation-exchange capacities can easily and reproducibly be controlled in the range of up to 300 microequiv/mL by changing the immersion time of the epoxy-containing polymer in the Na(2)SO(3) solution. The chromatographic performance of the produced monolithic capillary columns was evaluated through the separation of a model mixture of common cations such as Na(+), NH(4)(+), K(+), Mg(2+), and Ca(2+). As an example, these cations could be well separated from one another on a 15-cm-long cation-exchange monolithic column (column volume, 7.4 microL) with a capacity of 150 microequiv/mL by elution with 10 mM CuSO(4). The pressure drop of this 15-cm column was approximately 1 MPa at a normal linear velocity of 1 mm/s (a flow rate of 3 microL/min), and the numbers of theoretical plates for the cations were above 3000 plates/15 cm. This GMA-based cation-exchange monolithic column could withstand high linear velocities of at least 10 mm/s. Over a period of at least two weeks of continuous use, no significant changes in the selectivity and resolution were observed. The applicability of a flow rate gradient elution and the feasibility of direct injection determination of major cations in human saliva sample were also presented.

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“…This can usually be achieved by adding amino acidic [!] or alcoholic [2] modifiers to the eluent. In this paper the effect of polyethylene glycol (PEG) as an eluent modifier in increasing the separation selectivity of these cations is evaluated.…”

Section: Introduction 7lmentioning

confidence: 99%