Summary
A modified valve arrangement for zone-electrophoretic sample treatment (ZEST)-which is coupled on-line with column liquid chromatography — is used to pretreat biological (plasma) samples. Carry-over of plasma proteins depends on the pH of the electrophoresis buffer. The determination of propranolol, metoprolol, cromolyn and salicylic acid demonstrates that both basic and acidic analytes can be isolated from the plasma matrix with high selectivity. Analogous piperazines, with different protein binding properties, were used to study the influence of protein binding on the recovery. It is shown that high protein can cause a decreased recovery.
Similar content being viewed by others
References
W. Th. Kok, Chromatographia24, 442 (1987).
W. Th. Kok, K.-P. Hupe, R. W. Frei, J. Chromatogr.436, 421 (1988).
A. J. J. Debets, R. W. Frei, K.-P. Hupe, W. Th. Kok, J. Chromatogr.465, 315 (1989).
A. J. J. Debets, K.P. Hupe, U. A. Th. Brinkman, W. Th. Kok, Chromatographia29, 217 (1990).
M. W. F. Nielen, R. W. Frei, U. A. Th. Brinkman, inR. W. Frei andK. Zech (Eds.), “Selective Sample Handling and Detection in High-Performance Liquid Chromatography”, Part A (Journal of Chromatography Library, Vol. 39A), Elsevier, Amsterdam, 1987, p. 5–80.
U. Christians, K.-Fr. Seweing, inR. W. Frei andK. Zech (Eds.), “Selective Sample Handling and Detection in High-Performance Liquid Chromatography”, Part A (Journal of Chromatography Library, Vol. 39B), Elsevier, Amsterdam, 1989 p. 82–132.
D. C. Turnell, J. D. H. Cooper, J. Chromatogr.395, 613 (1987).
D. C. Turnell, J. D. H. Cooper, B. Green, F. Verillon, J. Chromatogr.456, 53 (1987).
U. R. Tjaden, E. A. Bruijn, R. A. M. van der Hoeven, C. Jol, J. van der Greef, H. Lingeman, J. Chromatogr.420, 53 (1987).
M. M. L. Aerts, W. M. J. Beek, U. A. Th. Brinkman, J. Chromatogr.435, 97 (1988).
M. M. L. Aerts, W. M. J. Beek, U. A. Th. Brinkman, J. Chromatogr.500, 453 (1990).
A. J. Debets, W. Th. Kok, K.-P. Hupe, U. A. Th. Brinkman, Chromatographia30, 361 (1990).
A. J. J. Debets, K.-P. Hupe, W. Th. Kok, U. A. Th. Brinkman, J. Chromatogr.600, 163 (1992).
A. J. J. Debets, H. El Arabi, K.-P. Hupe, U. A. Th. Brinkman, P. J. M. Hendriks, H. A. Claessens, F. M. Everaerts, Th. M. Noij, Analyst, in press.
N. Lammers, H. de Bree, C. P. Groen, B. J. de Jong, J. Chromatogr.496, 291 (1989).
O. H. Lowry, N. Roesbrough, A. L. Farr, R. J. Randall, J. Biol. Chem.193, 265 (1951).
K. Diem, C. Lentner, Scientific Tables, Ciba-Geigy, Basel, Switzerland, 1970.
M. A. Lefebvre, J. Girault, J. N. Fourtillan, J. Liq. Chromatogr.4, 483 (1981).
H. Winkler, W. Ried, B. Lemmer, J. Chromatogr.228, 223 (1982).
G. Musch, Y. Buelens, D. L. Massart J. Pharm. Biomed. Anal.7, 483 (1989).
W. J. Jusko, M. Gretch, Drug Metabolism Reviews,5, 43 (1976).
S. Vozeh, O. Schmiden, W. Taeschner, inG. J. Mannen (ed.), Clinical Pharmokinetics Drug Data Handbook, ADIS Press, Auckland, New Zealand, 1989, Ch. I.
E. Junker, Drug Research, 29, Birkhauser Verlag, Basel, Switzerland, 1985.
J. J. Gardner, J. Chromatogr.305, 228 (1984).
N. Kucharzyk, F. H. Segelman, J. Chromatogr.340, 243 (1985).
K. Brown, J. J. Gardner, W. J. S. Lockley, J. R. Preston, D. J. Wilkinson, Ann. Clin. Biochem.20, 31 (1983).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Debets, A.J.J., Schoutsen, T.P., Kok, W.T. et al. Zone electrophoretic sample treatment coupled on-line with column liquid chromatography for the determination of basic and acidic compounds in biological samples. Chromatographia 34, 581–588 (1992). https://doi.org/10.1007/BF02269867
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02269867