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PL
Przedstawiona praca jest ostatnim projektem naukowym nad jakim pracował Profesor Henryk Lamparczyk, który przedwcześnie zmarł 16 listopada 2012 roku w wieku 65 lat. Przeglądowa praca o charakterze dydaktyczno-poglądowym dotyczy zastosowania cyklodekstryn w bioanalityce i została napisana w oparciu o prace opublikowane przez Profesora i współpracowników. Niniejsza wersja bazuje na artykule pt. “Natural cyclodextrins: development in theory, chromatography and pharmacy, A. Chmielewska, H. Lamparczyk;” opublikowanej w materiałach Supramolecular Chemistry and Advanced Materials. Wojciech Macyk & Konrad Szaciłowski, Editors, Kraków Jagielonian University 2007, pages 131-136 i jest rozszerzona o wiadomości przedstawione w najnowszych publikacjach dotyczących zastosowania cyklodekstryn w HPLC, głównie do oznaczeń sterydów i analiz przesiewowych próbek środowiskowych.
EN
This is the last research project of Professor Henryk Lamparczyk that prematurely passed away at age 65. In his intention it was to prepare a demonstrative review paper concerning application of cyclodextrins in bioanalysis, based on his and co-worker contributions to the field of supramolecular chemistry. This version of paper is based on the manuscript entitled “Natural cyclodextrins: development in theory, chromatography and pharmacy, A. Chmielewska, H. Lamparczyk;” that was published in Supramolecular Chemistry and Advanced Materials. Wojciech Macyk & Konrad Szaciłowski, Editors, Kraków Jagielonian University 2007, pages 131-136 and now is extended for the latest papers concerning HPLC application of cyclodextrins for steroids analysis and environmental samples screening. The main tools applied in described investigations were various chromatographic techniques such as gas chromatography (GC), high performance liquid chromatography (HPLC) and thin-layer chromatography (TLC). Topics such as structure-retention relationships, equilibrium constants between cyclodextrins (CDs) and guest molecules, thermodynamics and CDs separations were discussed. Additionally few examples of practical applications of CDs in pharmacy as well as biomedical and environmental analysis are given.
2
Content available remote Quantitative determination of pentoxifylline in human plasma
EN
A rapid, optimized, and sensitive reversed-phase high-performance liquid chromatographic (RP-HPLC) method has been developed for deter-mination of pentoxifylline in human plasma. The analyte was extracted from the plasma with dichloromethane after addition of 0.2 mL 1 M NaOH. HPLC separation was performed on a C18 analytical column (250 mm × 4 mm i.d.) with acetonitrile–water, 45:55 (v/v), as mobile phase. Spectro-photometric detection was performed at 275 nm. Calibration graphs were linear from 25 to 1000 ng mL-1 pentoxifylline. Recovery of the drug from human plasma was 92.1%, and the detection limit was 20 ng mL-1.
EN
An accurate and precise HPLC assay has been established for simul-taneous determination of fluocinolone acetonide and additives in gel. Drugs were chromatographed on a C18 reversed-phase column with 55:45 (v/v) methanol–water as mobile phase and detection at 238 nm. Solution con-centrations were measured on a weight basis to avoid the use of an internal standard. The method was statistically validated for linearity, accuracy, precision, and selectivity. Linearity for assay of fluocinolone acetonide, methyl 4-hydroxybenzoate (nipagin M), and propyl 4-hydroxybenzoate (nipagin P) were confirmed over the ranges 0.5-30, 5-200, and 10-120 µg mL-1, respectively. Because of the simplicity and accuracy of the method, it was used for routine analysis of fluocinolone acetonide in ointment. It does not require any specific sample preparation.
4
Content available remote Temperature controlled thin-layer chromatography
EN
A problem of chromatographic chambers used for temperature control of the TLC plates is discussed from a practical point of view. The separations of chiral and non-chiral compounds using home-made and commercially available devices which work without and with temperature gradient are reported.
PL
Dokonano przeglądu literatury dotyczącej chromatografii cienkowarstwowej w komorach umożliwiających kontrolowanie temperatury procesu chromatograficznego. Zebrano przykłady wykorzystania prototypów i urządzeń produkowanych seryjnie do rozdzielania substancji chiralnych oraz achiralnych przy użyciu procesu izotermicznego w różnych temperaturach oraz gradientu temperatury.
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