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High performance liquid chromatographic determination of clindamycin in pharmaceutical formulations
(Srpsko hemijsko društvo, Beograd, 1997)
A specific and simple HPLC procedure was developed, su table for the determination of dindamycin hydrochloride monohydrate (CLHC) and clindamycin 2-dihydrogenphosphate (CLPH) in pharmaceutical formulations. Rp-HPLC analysis ...
Variability of the essential oil composition of the species Satureja montana L. (Lamiaceae)
(Journal of Essential Oil Research, 1997)
The chemical composition of the oils of one population of Satureja montana L. subsp. pisidica (Wettst.) Silic and two populations of S. montana subsp. montana were investigated on the intrapopulational and interpopulational ...
Determination of midazolam in pharmaceutical dosage forms by second-order derivative ultraviolet spectrophotometry
(Srpsko hemijsko društvo, Beograd, 1997)
A second-order derivative ultraviolet spectroscopic method for the determination of midazolam in the presence of maleic acid is described. The assays were carried out in borate buffer (pH 9.2) at a wavelength of 222 nm, ...
A kinetic method for the determination of selenium(IV) in ethanol solution
(Srpsko hemijsko društvo, Beograd, 1997)
A kinetic method for the determination of selenium(IV) in ethanol solution is proposed. The method is based on the action of selenium(IV) upon the oxidation of Nile Blue A by hydrogen peroxide in the presence of phosphate ...
Flavonoids from the herb resin of Achillea atrata L. Subspec, multifida (DC.) HEIM
(Medical Information Center, 1997)
Two flavonoid aglycones were isolated from the resin obtained by washing dry herb of Achillea atrata subspec. multifida with chloroform. The spectral characteristics (UV, MS, 1 H NMR) of these aglycones indicated that they ...
The influence of Eudragit type on the dissolution rate of acetylsalicylic acid from matrix tablets
(Magyar Gyogyszereszeti Tarsasag, 1997)
The effect of four Eudragits used as matrix substances on the physical characteristics of tablets and on the dissolution rate of acetylsalicylic acid has been investigated. The concentration of matrix substance necessary ...
Anticoagulant effect of various crystallohydrates of tungstophosphoric acid and their Na salt and proposed acting mechanism
(Društvo medicinskih biohemičara Srbije i Crne Gore, Beograd i Univerzitet u Beogradu - Farmaceutski fakultet, Beograd, 1997)
The influence of various crystalohydrates of tungstophosphoric acid (WPA): 29-WPA, 6-WPA, 0-WPA and ''D''-WPA, as well as of various crystalohydrates of neutral Na salt (Na(3)WPA): 16-Na(3)WPA, 6-Na(3)WPA and 0-Na(3)WPA, ...
UV spectrophotometric microdetermination of L-DOPA based on complex formation with copper(II)ion
(Marcel Dekker Inc, New York, 1997)
The UV spectrophotometric investigations obtained for the reaction between L-DOPA and copper(II)ion contribute to the clarification of equilibrium conditions of the complex formation both in the excess of metal ion and ...
Gas chromatography mass spectrometry determination of isosorbide 5-mononitrate and related impurities in raw materials and dosage formulations
(Pergamon-Elsevier Science Ltd, Oxford, 1997)
A straightforward quantitative method for gas chromatography-mass spectrometry determination of isosorbide 5-mononitrate (ISSMN) and its related impurities such as isosorbide (IS), isosorbide diacetate (ISDA) and isosorbide ...
Spectrophotometric determination of hesperidin by Al(III)-hesperidin complex in water-methanol solution
(Marcel Dekker Inc, New York, 1997)
The composition and the stability constant of the Al(III)-hesperidin complex were determined by suitable spectrophotometric methods and pH measurements. The formation of the complex, whose concentration stability constant ...