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Ethylvinylbenzene/divinylbenzene

The polymers are loosely grouped according to chemical functionality with the styrene-divinylbenzenes (some XADs, Chromosorbs, and Porapaks) together with the ethylvinylbenzene-divinylbenzenes (Porapak Q and Synachrom). [Pg.213]

The main types of inorganic sorbents are silica gels, molecular sieves/zeolites, aluminum oxides and magnesium silicates. Carbon-based sorbents include activated charcoals, carbon blacks, graphihzed carbon blacks and graphitized molecular sieves. Styrene-divinylbenzene copolymers, ethylvinylbenzene/divinylbenzene... [Pg.4]

Porous polymers also are useful for gas analyses and for very polar molecules, such as amines, glycols, and acids. Copolymers of styrene and divinylbenzene and others, such as ethylvinylbenzene-divinylbenzene, cross-linked acrylic ester, vinylpyridine, pyrollidone, and ethylene glycol dimethacrylate, are commercially available. ... [Pg.472]

The highly cross-linked polymeric nonporous core may consist of either a polystyrene-divinylbenzene or an ethylvinylbenzene-divinylbenzene substrate. The latex coatings are generally made from vinylben-zenylchloride polymer cross linked with divinylbenzene and fully functionalized with an appropriate quaternary amine for introducing anion-exchange properties. [Pg.1130]

The properties and performance of a commercial weak-acid resin column (Dionex CS12) have been described [41]. The substrate is a highly cross-linked, macroporous ethylvinylbenzene-divinylbenzene polymer with a bead diameter of 8 pm, a pore size of 6 nm, and a specific surface area of 3(X) m /g. In a second step, this substrate was grafted with another polymer containing carboxylate groups. The exchange capacity is listed as 2.8 mequiv/column for a 250 mm x 4 mm i.d. column. With this column, simple eluents such as hydrochloric or methanesulfonic acid can be used to separate mono- and divalent cations rapidly and efficiently under isocratic conditions. [Pg.54]

Fig. 2. Separation of organic compounds from water. Conditions 115°C, 60 ml of Hj per minute, column 6 foot X %e inch, ethylvinylbenzene-divinylbenzene polymer. Reproduced from Hollis (HIO) with permission. Fig. 2. Separation of organic compounds from water. Conditions 115°C, 60 ml of Hj per minute, column 6 foot X %e inch, ethylvinylbenzene-divinylbenzene polymer. Reproduced from Hollis (HIO) with permission.
Different methods of solid-phase extraction (SPE) of wine volatiles were developed by using Amberlite XAD-2 polystyrenic resins (Gunata et al., 1985 Versini et al., 1988), reverse-phases Ci8 (Williams, 1982 Gianotti and Di Stefano, 1991 Di Stefano, 1991 Zulema et al., 2004 Ferreira et al., 2004), and more recently, highly cross-linked hydroxyl-ated polystyrenic phases (e.g., ENV+, Ferreira et al., 2004 Boido et al., 2003) and highly cross-linked ethylvinylbenzene-divinylbenzene copolymers (e.g., LiChrolut EN, Lopez et al., 2002 Ferreira et al., 2004 Genovese et al., 2005) stationary phases. [Pg.118]

For analysis of AAP in wine, an SPE sample preparation method can be performed by using highly cross-linked ethylvinylbenzene-divinylbenzene copolymers (e.g., LiChrolut EN) cartridges. A volume of 50 mL of wine spiked with an internal standard (e.g., acetophenone-d8 or <73-AAP) is passed through the cartridge, then analytes are recovered with 1 mL of dichloromethane. The organic phase is washed with 1 mL of a sodium hydrogen carbonate solution, then dried over anhydrous sodium sulfate. The residual solution is added to 100-pL... [Pg.149]

Simultaneous analysis of TCA and TBA was performed by extraction of 50 mL of wine with a 50-mg ethylvinylbenzene-divinylbenzene copolymer cartridge and recovering analytes with 0.6 mL of dichloromethane (Insa et al., 2005). [Pg.252]

Kelly, J.W. Stewart, J.T. Separation of selected beta lactam antibiotic epimers on gamma cyclodextrin, ion exchange ethylvinylbenzene/divinylbenzene/copolymer and polyCstyrene- divinylbenzene) copolymer stationary phases. J.Liq.Chromatogr, 1991, 14, 2235-2250 [also carbemicillin, moxalactam, ticarcillin]... [Pg.328]

Methacrylate and LiChrolut EN (ethylvinylbenzene/divinylbenzene) have also been used for the extraction of sulfur-containing phosphoro-acid esters and pesticides, such as malathion and endosulfan. [Pg.351]

Table 16.3 Products resulting from the degradation of a butadiene-ethylvinylbenzene-divinylbenzene copolymer with but-2-ene, in order of increasing GC retention time... Table 16.3 Products resulting from the degradation of a butadiene-ethylvinylbenzene-divinylbenzene copolymer with but-2-ene, in order of increasing GC retention time...
Table 2 Selected columns based on the surface-aminated ethylvinylbenzene-divinylbenzene (EVB DVB) resins. Table 2 Selected columns based on the surface-aminated ethylvinylbenzene-divinylbenzene (EVB DVB) resins.
To achieve the required higher capacity, the substrate particles consisted of 55% crosslinked ethylvinylbenzene-divinylbenzene core with a surface area of about 450 g . A polymer containing three carboxyhc groups per unit was applied as... [Pg.179]

Styrene/divinylbenzene copolymers, ethylvinylbenzene/divinylbenzene copolymers, polymethacrylate, and polyvinyl alcohol resins are the most important of all the organic compounds that were tested for their suitability as substrate materials in the manufacturing process for polymer-based anion exchangers. [Pg.37]

Overview of Surface-Aminated Ethylvinylbenzene/Divinylbenzene Resins... [Pg.49]

Table 3.3 Structural and technical properties of ethylvinylbenzene/divinylbenzene copolymers. Table 3.3 Structural and technical properties of ethylvinylbenzene/divinylbenzene copolymers.
Substrate material Ethylvinylbenzene/ divinylbenzene Ethylvinylbenzene/ divinylbenzene... [Pg.440]

Acrylate-based latex beads can also be agglomerated on a SS% cross-linked ethylvinylbenzene/divinylbenzene (EVB/DVB)-based microporous support material, which represents the solvent-compatible version of this stationary phase (lonPac AS9-SC). Both separators exhibit the same selectivity, so that a particular method can be transferred from one column to the other. [Pg.66]


See other pages where Ethylvinylbenzene/divinylbenzene is mentioned: [Pg.320]    [Pg.178]    [Pg.175]    [Pg.258]    [Pg.78]    [Pg.1241]    [Pg.1727]    [Pg.607]    [Pg.1027]    [Pg.73]    [Pg.404]    [Pg.405]    [Pg.436]    [Pg.436]    [Pg.42]    [Pg.282]    [Pg.282]    [Pg.445]    [Pg.19]    [Pg.19]   
See also in sourсe #XX -- [ Pg.49 , Pg.54 ]




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Divinylbenzene

Divinylbenzenes

Resins ethylvinylbenzene/divinylbenzene

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