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Gradient-elution liquid chromatography

Micellar gradient elution liquid chromatography with electrochemical detection with sodium dodecyl sulfate has been used to separate phenols [186]. [Pg.274]

Typically, in gradient elution liquid chromatography, electrochemical detection has been difficult due to base-line shifts that result as a consequence of the altered mobile phase composition. However, a unique property of micelles allows for much improved compatibility of gradients (i.e. gradient in terms of micellar concentration or variation of small amount of additive such as pentanol) with electrochemical detectors. This has been demonstrated by the separation and electrochemical detection of phenols using micellar gradient LC (488). A surfactant (apparently non-micellar) gradient elution with electrochemical detection has also been successfully applied for the assay of some thyroid hormones by LC (491). [Pg.60]

Khaledi MG, Dorsey JG (1985) Hydro-organic and micellar gradient elution liquid chromatography with electrochemical detection. Anal Chem 57 2190-2196 Kissinger PT (1989) Biomedical applications of liquid chromatography-electrochemistry. J Chromatogr 488 31-52... [Pg.113]

Kirkland, J.J. Glajch, J.L. Optimization of mobile phases for multisolvent gradient elution liquid chromatography. J. Chromatogr. 1983, 255, 27. [Pg.1024]

Fig. 20.11. Gradient elution liquid chromatography of a mixture ( blend ) of a number of copolymers. Column Supelcosil Discover Ci8, 150 mm long x 2.1 mm i.d. particle size 5 pm pore diameter 180 A temperature 25°C flow rate 0.2 ml min injection volume 5 pL sample concentration ... Fig. 20.11. Gradient elution liquid chromatography of a mixture ( blend ) of a number of copolymers. Column Supelcosil Discover Ci8, 150 mm long x 2.1 mm i.d. particle size 5 pm pore diameter 180 A temperature 25°C flow rate 0.2 ml min injection volume 5 pL sample concentration ...
Mori S (1996) Characterization of styrene-acrylonitrile copolymers by size exclusion chromatography/stepwise gradient elution-liquid precipitation chromatography. Int J Polym Anal Charact 2 185-92. [Pg.299]

DALLUGE J J, NELSON B c, THOMAS J B and SANDER L 0 (1998) Selection of column and gradient elution system for the separation of catechins in green tea using high-performance liquid chromatography , J Chromatogr A, 793, 265-74. [Pg.151]

P. W. High speed gradient elution reversed-phase liquid chromatography. [Pg.353]

Reversed-phase Cig chromatography column. Keystone Scientific Betasil, 100 x 2.0-mm i.d., 5-pm particle size, 100 A, Part No. 105-701-2-CPF TSQ 7000 LC/MS/MS system with electrospray ionization (ESI) or atmospheric pressure chemical ionization (APCI) interface and gradient high-performance liquid chromatography (HPLC) unit, or equivalent Vacuum manifold for use with SPE cartridges (Varian Vac Elut 10 or equivalent)... [Pg.491]

The popularity of reversed-phase liquid chromatography (RPC) is easily explained by its unmatched simplicity, versatility and scope [15,22,50,52,71,149,288-290]. Neutral and ionic solutes can be separated simultaneously and the rapid equilibration of the stationary phase with changes in mobile phase composition allows gradient elution techniques to be used routinely. Secondary chemical equilibria, such as ion suppression, ion-pair formation, metal complexatlon, and micelle formation are easily exploited in RPC to optimize separation selectivity and to augment changes availaple from varying the mobile phase solvent composition. Retention in RPC, at least in the accepted ideal sense, occurs by non-specific hydrophobic interactions of the solute with the... [Pg.202]

The remainder of this section deals primarily with selectivity optimization in isocratic liquid chromatography and with gradient elution Before entering these subjects proper, however, a discussion of the relevant chromatographic properties of solvents is in order as a framework for the intuitive selection of the preferred solvent or solvent mixtures for selectivity optimization. [Pg.234]

P. Jandera and J. Churacek, "Gradient Elution In Column Liquid Chromatography", Elsevier, Amsterdam, 1985. [Pg.303]

See other pages where Gradient-elution liquid chromatography is mentioned: [Pg.760]    [Pg.234]    [Pg.247]    [Pg.166]    [Pg.132]    [Pg.197]    [Pg.58]    [Pg.93]    [Pg.101]    [Pg.101]    [Pg.107]    [Pg.1038]    [Pg.760]    [Pg.234]    [Pg.247]    [Pg.166]    [Pg.132]    [Pg.197]    [Pg.58]    [Pg.93]    [Pg.101]    [Pg.101]    [Pg.107]    [Pg.1038]    [Pg.248]    [Pg.318]    [Pg.558]    [Pg.609]    [Pg.1536]    [Pg.24]    [Pg.143]    [Pg.109]    [Pg.150]    [Pg.493]    [Pg.7]    [Pg.332]    [Pg.502]    [Pg.402]    [Pg.426]    [Pg.210]    [Pg.231]    [Pg.233]    [Pg.251]    [Pg.714]    [Pg.795]    [Pg.862]   
See also in sourсe #XX -- [ Pg.213 ]



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