caa a22 4500 463220056 CHVBK 20180405153209.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1134/S1061934807080035 doi (NATIONALLICENCE)springer-10.1134/S1061934807080035 Determination of endo- and exogenous corticosteroids by cyclodextrin-modified micellar electrokinetic chromatography with the use of on-line preconcentration [Elektronische Daten] [L. Kartsova, E. Strel'nikova] A method was proposed for the simultaneous determination of steroids of the endo- and exogeneous origin with the use of micellar electrokinetic chromatography, which provides the determination of residual medicines in biological fluids and the control of medication efficiency at different steroidogenesis abnormalities. The introduction of a macrocyclic addition of β-cyclodextrin (from 1 to 6 mM) into a buffer electrolyte solution (25 mM phosphoric acid, 20 mM sodium dodecyl sulfate, 4.5 mM urea, pH 2.5) or into a sample solution decreases the detection limit by a factor of 20-200. Pleiades Publishing, Ltd., 2007 Kartsova L. St. Petersburg State University, Universitetskii pr. 2, 198904, Petrodvorets, St. Petersburg, Russia aut Strel'nikova E. St. Petersburg State University, Universitetskii pr. 2, 198904, Petrodvorets, St. Petersburg, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/8(2007-08-01), 716-720 1061-9348 62:8<716 2007 62 10809 https://doi.org/10.1134/S1061934807080035 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807080035 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kartsova L. St. Petersburg State University, Universitetskii pr. 2, 198904, Petrodvorets, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Strel'nikova E. St. Petersburg State University, Universitetskii pr. 2, 198904, Petrodvorets, St. Petersburg, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/8(2007-08-01), 716-720 1061-9348 62:8<716 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer