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Coupled-column liquid chromatography

Multidimensional LC separation has been defined as a teehnique whieh is mainly eharaeterized by two distinet eriteria, as follows (1). The first eriterion for a multidimensional system is that sample eomponents must be displaeed by two or more separation teehniques involving orthogonal separation meehanisms (2), while the seeond eriterion is that eomponents that are separated by any single separation dimension must not be reeombined in any further separation dimension. [Pg.110]

Can concentrate ti ace solutes from More time consuming [Pg.111]

Can work with two LC modes that Sample loss or contamination [Pg.111]

Decreased total analysis time Requkes automated or semi-automated [Pg.111]

In order to optimize separations on eoupled-eolumn liquid ehromatographie systems under the eonditions of solvent modulation, we need to eonsider the parameters whieh affeet the resolution, as follows. [Pg.111]

Can concentrate trace solutes from large volumes [Pg.111]

Separation obtained on the first column can, at least partly, be reduced on the second column Requires automated or semi-automated instrumentation [Pg.111]

G. S. Rule, A. V. Moi dehai and J. Henion, Determination of carbofuran by on-line immunoaffinity cliromatography with coupled-column liquid chromatography/mass spectrometiy . Aim/. Chem. 66 230-235 (1994). [Pg.132]

Hogendoorn, E.A., Dijkmann, E., Baumann, B., Hidalgo, C., Sancho, J.-V., and Hernandez, F., Strategies in using analytical restricted access media columns for the removal of humic acid interferences in the trace analysis of acidic herbicides in water samples by coupled column liquid chromatography with UV detection, Anal. Chem., 71, 1111, 1999. [Pg.69]

Gray, M.J., Dennis, G.R., Slonecker, P.J., Shalhker, R.A. (2005). Utilising retention correlation for the separation of oligostyrenes by coupled-column liquid chromatography. J. Chromatogr. A 1073, 3. [Pg.57]

Edholm, L.E., Lindberg, C., Paulson, J. (1988). Determination of drug enantiomers in biological samples by coupled column liquid chromatography and liquid chromatogra-phy-mass spectrometry. J. Chromatogr. 424, 61-72. [Pg.340]

Hernandez F. et al., 1998. Coupled-column liquid chromatography applied to the trace-level determination of triazine herbicides and some of their metabolites in water. Anal Chem 70 3322. [Pg.294]

C. Corradini, Coupled-column liquid chromatography, in Multidimensional Chromatography, L. Mondello, C. Lewis, K.D. Bartle (Eds.) John Wiley Sons, Chichester, U.K., 2001, pp. 109-129. [Pg.116]

Figure 11.2 (a) LC-LC system with post-column reaction detection for the determination of ampicillin in plasma (b) Chromatogram of plasma sample (collected 10 min after oral administration of 670 p,mol of ampicillin) containing 1.26 jlM ampicillin (amp). Reprinted from Journal of Chromatography, 567, K. Lanbeck-Vallen et al., Determination of ampicillin in biological fluids by coupled-column liquid chromatography and post-column derivatization, pp. 121-128, copyright 1991, with permission from Elsevier Science. [Pg.261]

E. Eklund, C. Norsten-Hoog and T. Arvidsson, Determination of free concentration of sameridine in blood plasma by ultrafiltration and coupled-column liquid chromatography , J. Chromatogr. B 708 195-200 (1998). [Pg.291]

K. Lanbeck-Vallen, J. Carlqvist and T. Nordgren, Determination of ampicillin in biological fluids by coupled-column liquid chromatography and post-column derivatiza-tion ,7. Chromatogr. 567 121-128(1991). [Pg.292]

P. O. Edlund, L. Bowers and J. Henion, Determination of methandrostenolone and its metabolites in equine plasma and urine by coupled-column liquid chromatography with ultraviolet detection and confirmation by tandem mass spectrometry , J. Chromatogr. 487 341-356(1989). [Pg.292]

B.-M. Eriksson and B.-A. Persson, Determination of 5-hydroxytryptamine and 5-hydroxyindoleacetic acid in plasma by direct injection in coupled-column liquid chromatography with electrochemical detection , J. Chromatogr. 459 351-360 (1988). [Pg.295]

Figure 13.10 LC-LC chromatogram of a surface water sample spiked at 2 jxg 1 1 with atrazine, and its metabolites (registered at 220 nm). Conditions volume of sample injected, 2 ml clean-up time, 2.60 min transfer time, 4.2 min The blank was subtracted. Peak identification is as follows 1, DIA 2, HA 3, DEA 4, atrazine. Reprinted from Journal of Chromatography, A 778, F. Hernandez et al., New method for the rapid determination of triazine herbicides and some of their main metabolites in water by using coupled-column liquid chromatography and large volume injection , pp. 171-181, copyright 1997, with permission from Elsevier Science. Figure 13.10 LC-LC chromatogram of a surface water sample spiked at 2 jxg 1 1 with atrazine, and its metabolites (registered at 220 nm). Conditions volume of sample injected, 2 ml clean-up time, 2.60 min transfer time, 4.2 min The blank was subtracted. Peak identification is as follows 1, DIA 2, HA 3, DEA 4, atrazine. Reprinted from Journal of Chromatography, A 778, F. Hernandez et al., New method for the rapid determination of triazine herbicides and some of their main metabolites in water by using coupled-column liquid chromatography and large volume injection , pp. 171-181, copyright 1997, with permission from Elsevier Science.
J. V. Sancho, C. Hidalgo and F. Hernandez, Direct determination of bromacil and diuron residues in environmental water samples by coupled-column liquid chromatography and large-volume injection , J. Chromatogr. 761 322-326 (1997). [Pg.372]

See other pages where Coupled-column liquid chromatography is mentioned: [Pg.109]    [Pg.260]    [Pg.261]    [Pg.389]    [Pg.121]    [Pg.109]    [Pg.110]    [Pg.111]    [Pg.113]    [Pg.115]    [Pg.117]    [Pg.119]    [Pg.121]    [Pg.123]    [Pg.125]    [Pg.127]    [Pg.129]    [Pg.130]    [Pg.131]    [Pg.133]    [Pg.247]    [Pg.260]    [Pg.292]    [Pg.292]    [Pg.294]    [Pg.372]    [Pg.373]    [Pg.374]    [Pg.445]   


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