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Salting-out thin-layer chromatography of some angiotensin converting enzyme inhibitors on different sorbents
(Vieweg, Wiesbaden, 2001)
Chromatographic behaviour of six anti hypertensive drugs from the class of ACE inhibitors was studied under conditions of salting-out thin-layer chromatography on silica-gel, cellulose and polyacrylonitrile (PANS) as ...
Synthesis of new stereoisomeric nitrate esters derived from isosorbide-mononitrate II: Bicyclic delta-lactams and tetrahydrofuran derivatives
(Georg Thieme Verlag, 2001)
The synthesis of the diastereomeric nitrate esters (3R,4R)-(2-hydroxy-4-nitrooxytetrahydrofuran-3-yloxy)acetonitrile (5b) and (3R,4S)-(2-hydroxy-4-nitrooxytetrahydrofuran-3-yloxy)acetonitrile (9) was achieved by the Beckmann ...
A preliminary study of beta-cyclodextrin/metoprolol tartrate inclusion complex for potential enantiomeric separation
(Pergamon-Elsevier Science Ltd, Oxford, 2001)
The inclusion complex formation between Metoprolol tartarata (MeT) and beta -cyclodextrin (beta -CD) has been investigated using hyperchromic shift at lambda (max) 274.4 nm of MeT. Different parameters such as stirring ...
Variability of essential oils of Satureja montana L. and Satureja kitaibelii Wierzb. ex Heuff. from the central part of the Balkan peninsula
(Pergamon-Elsevier Science Ltd, Oxford, 2001)
The results of the essential oil composition confirm that there are differences between populations within the same subspecies (Satureja montana ssp. montana), between the subspecies (Satureja montana ssp. montana and ...
The use of a response surface methodology on HPLC analysis of methyldopa, amiloride and hydrochlorothiazide in tablets
(Pergamon-Elsevier Science Ltd, Oxford, 2001)
A multifactor optimisation technique is successfully applied to develop a new HPLC method in which methyldopa, hydrochlorothiazide and amiloride were analysed and determined on a C18 column with detection at 286 nm. The ...
Simultaneous HPLC determination of nitrendipine and impurities of the process of synthesis
(Pergamon-Elsevier Science Ltd, Oxford, 2001)
A method has been developed for separation of nitrendipine and its impurities of reaction partners and side reaction products by high-performance liquid chromatographic method on a RP-ls column and detection at 238 nm. The ...
Derivative spectrophotometric method for determination of acidity constants of single step acid-base equilibria
(Elsevier Science BV, Amsterdam, 2001)
A general derivative spectrophotometric method for determination of acidity constants is developed. The method appears suitable in cases when classical spectrophotometry cannot be employed due to little differences in the ...
Quantitative analysis of analgoantipyretics in dosage form using planar chromatography
(Pergamon-Elsevier Science Ltd, Oxford, 2001)
In the therapy of pain of weaker genesis, frequently used drugs usually represent a mix of analgoantipyretics of different chemical structures, mostly derivatives of salicylic acid, pyrazolone and p-aminophenol as well as ...