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Chromatography column switching

Lamprecht, G., Kraushofer, T., Stoschitzky, K., Lindner, W. (2000). Enantioselective analysis of (R)- and (S)-atenolol I urine samples by a high-performance liquid chromatography column-switching setup. J. Chromatogr. B 740, 219-226. [Pg.342]

ON-LINE SOLID-PHASE EXTRACTION-LIQUID CHROMATOGRAPHY COLUMN-SWITCHING TECHNIQUE... [Pg.1405]

Liu, G.L. Sha, R.G. Gao, S. Shen, Y.X. Wang, S.X. [Determination of cefixime in human plasma and urine using high performance liquid chromatography column switching technique]. Yao Hsueh Hsueh Poo, 1993, 28, 216-221... [Pg.277]

An ion chromatographic system that included column switching and gradient analysis was used for the deterrnination of cations such as Na", Ca ", Mg ", K", and NH" 4 and anions such as Cf, NO, NO , and in fog water samples (72). Ion-exchange chromatography compares very well with... [Pg.245]

Figure 5.2 Schematic representation of the final column-switching system (a) foi ward-flush position (b) back-flush position (further details are given in the text). Reprinted from Journal of Chromatography, A 828, A. K. Sakhi et al. Quantitative determination of endogenous retinoids in mouse embiyos by high-performance liquid cliromatography with on-line solid-phase exti action, column switcliing and electi ochemical detection , pp. 451 -460, copyright 1998, with permission from Elsevier Science. Figure 5.2 Schematic representation of the final column-switching system (a) foi ward-flush position (b) back-flush position (further details are given in the text). Reprinted from Journal of Chromatography, A 828, A. K. Sakhi et al. Quantitative determination of endogenous retinoids in mouse embiyos by high-performance liquid cliromatography with on-line solid-phase exti action, column switcliing and electi ochemical detection , pp. 451 -460, copyright 1998, with permission from Elsevier Science.
Figure 5.3 Analysis of 100 ml of (a) surface water and (b) drinking water sample spiked with 0.1 pig/ml of microcystins, using column-switching HPLC 1, microcystin-RR 2, microcystin-YR 3, microcystin-LR. Reprinted from Journal of Chromatography A, 848, H. S. Lee et al, On-line trace enrichment for the simultaneous determination of microcystins in aqueous samples using high performance liquid chromatography with diode-array detection , pp 179-184, copyright 1999, with permission from Elsevier Science. Figure 5.3 Analysis of 100 ml of (a) surface water and (b) drinking water sample spiked with 0.1 pig/ml of microcystins, using column-switching HPLC 1, microcystin-RR 2, microcystin-YR 3, microcystin-LR. Reprinted from Journal of Chromatography A, 848, H. S. Lee et al, On-line trace enrichment for the simultaneous determination of microcystins in aqueous samples using high performance liquid chromatography with diode-array detection , pp 179-184, copyright 1999, with permission from Elsevier Science.
Figure 5.4 Schematic diagrams of a heait-cut valve configuration system. Reprinted from Journal of Chromatography, 602, S. R. Villasenor, Matrix elimination in ion cliromatography by heart-cut column switching techniques , pp. 155-161, copyright 1992, with permission from Elsevier Science. Figure 5.4 Schematic diagrams of a heait-cut valve configuration system. Reprinted from Journal of Chromatography, 602, S. R. Villasenor, Matrix elimination in ion cliromatography by heart-cut column switching techniques , pp. 155-161, copyright 1992, with permission from Elsevier Science.
M. A. J. Bayliss, P. R. Baker and D. Wilkinson, Determination of the two major human metabolites of tipredane in human urine by high-performance liquid chromatography with column switching , 7. Chromatogr. B 694 199-209 (1997). [Pg.292]

K. Yamashita, M. Motohaslii and T. Yashiki, High-performance liquid cliromatograpliic determination of phenylpropanolamine in human plasma and urine, using column switching combined with ion-pair chromatography , J. Chromatogr. 527 103-114 (1990). [Pg.293]

Y. Oda, N. Asakawa, T. Kajima, Y. Yoshida and T. Sato, On-line determination and resolution of verapamil enantiomers by high-performance liquid chromatography with column-switching , Pharm. Res. 8 997-1001 (1991). [Pg.294]

J. R K. Huber and G. Lamprecht, Assay of neopterin in serum by means of two-dimensional high-performance liquid chromatography with automated column switching using tliree retention mechanism , 7. Chromatogr. B 666 223-232(1995). [Pg.295]

Figure 13,12 Illusti ation of the clean-up method, showing the analysis of an air sample (a) with and (b) without column switching. Details of the analytical conditions are given in the text. Reprinted from Journal of Chromatography, A 697, R R. Kootsti a and H. A. Herbold, Automated solid-phase exti action and coupled-column reversed-phase liquid cltromatogra-phy for the trace-level determination of low-molecular-mass carbonyl compounds in ak , pp. 203-211, copyright 1995, with permission from Elsevier Science. Figure 13,12 Illusti ation of the clean-up method, showing the analysis of an air sample (a) with and (b) without column switching. Details of the analytical conditions are given in the text. Reprinted from Journal of Chromatography, A 697, R R. Kootsti a and H. A. Herbold, Automated solid-phase exti action and coupled-column reversed-phase liquid cltromatogra-phy for the trace-level determination of low-molecular-mass carbonyl compounds in ak , pp. 203-211, copyright 1995, with permission from Elsevier Science.
Heat and reflux a 5-g portion of soil sample with 50 mL of methanol-phosphate buffer (pH 7)-water (15 7 28, v/v/v) solvent mixture in a round-bottom flask for 1 h. After cooling, transfer a 10-mL portion of the supernatant to a test-tube and mix with 11 mL of 0.02M H3PO4 solution. Load this solution on to a silica-based SPE cartridge (Analytichem International Clin-Elut 1020) at a flow rate of 1-2 drops per second. Discard this fraction. Elute the analytes with 30 mL of dichloromethane. Concentrate the eluate to dryness with air in a water-bath at a temperature of 40 °C (do not use vacuum). Dissolve the residues in 5mL of HPLC injection solution [900 mL of water - - 50 mL of phosphate buffer (pH 7) 4-50 mL of ACN 4-4 g of TBABr]. Pinal analysis is performed using liquid chromatography/ultraviolet detection (LC/UV) with a three-column switching system. [Pg.593]

Suzuki, Y., Determination of low-molecular-mass organic acids in fogwater by ion-exchange chromatography with automatic column switching, J. Chromatogr. A, 773, 123, 1997. [Pg.306]

Zhong, L. and Yeh, K. C., Determination of indinavir in human cerebrospinal fluid and plasma by solid-phase extraction and high-performance liquid chromatography with column switching, J. Chromatogr. B, 734, 63, 1999. [Pg.312]

The use of extraction cartridges is one example of a technique known as column switching (it is also often called multidimensional chromatography). The method can be used, either on-line... [Pg.206]

The example shown in Fig. 3.4g uses off-line column switching to combine exclusion and reverse phase chromatography for the separation of pesticides from a complex sample matrix. [Pg.207]

Freeman, D.H. (1981). Review Ultraselectively through column switching and mode sequencing in liquid chromatography. Anal. Chem. 53, 2-5. [Pg.31]

Samuel, C., Davis, J.M. (2002). Statistical-overlap theory of column switching in gas chromatography application to flavor and fragrance compounds. Anal. Chem. 74, 2293. [Pg.58]

Huber, J.F.K., Van der Linden, R., Ecker, E., Oreans, M. (1973). Column switching in high-pressure liquid chromatography. J. Chromatogr. 83, 267-279. [Pg.122]

Guo, X., Fukushima, T., Li, F., Imai, K. (2002). Determination of fluoxetine enantiomers in rat plasma by precolumn fluorescence derivatization and column-switching high-performance liquid chromatography. Analyst 127, 480-484. [Pg.341]

Hsu, C.L., Walters, R.R. (1995). Assay of the enantiomers of ibutilide and artilide using solid-phase extraction, derivatization, and achiral-chiral column-switching high-performance liquid chromatography. J. Chromatogr. B 667, 115-128. [Pg.341]

Lui, L., Cheng, H., Zhao, J.J., Rogers, J.D. (1997). Determination of montelukast (MK-0476) and its S-enantiomer in human plasma by stereoselective high-performance liquid chromatography with column switching. J. Pharm. Biomed. Anal. 15, 631-638. [Pg.342]

Mangani, F., Luck, G., Fraudeau, C., Verette, E. (1997). Online column-switching high-performance liquid chromatography analysis of cardiovascular drugs in serum with automated sample clean-up and zone-cutting technique to perform chiral separation. J. Chromatogr. A 762, 235-241. [Pg.342]

Morikawa, A., Hamase, K., Zaitsu, K. (2003). Determination of D-alanine in the rat central nervous system and periphery using column-switching high-performance liquid chromatography. Anal. Biochem. 312, 66-72. [Pg.342]

Oda, Y., Asakawa, N., Kajima, T., Yoshida, Y., Sato, T. (1991). Column-switching high-performance liquid chromatography for online simultaneous determination and resolution of enantiomers of verapamil and its metabolites. Pharm. Res. 8, 997-1001. [Pg.343]

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See also in sourсe #XX -- [ Pg.190 ]

See also in sourсe #XX -- [ Pg.751 ]

See also in sourсe #XX -- [ Pg.751 ]

See also in sourсe #XX -- [ Pg.751 ]



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