UV-visible and atomic spectrophotometry and HPLC techniques were applied for the determination of tetracycline (TC) in pharmaceutical preparations via complexation of the drug with Au(III) and Hg(II) ions in solutions. The mole ratio of TC to metal ions was 1 : 1. Maximum peak absorption at λ 425 and 320 nm for the two ions, respectively, was optimized at heating temperature 75°C for 15 minutes...

In this work the antimicrobial activity of TiO2 nanopore thin films sensitized by Copper tetracarboxyphthalocyanines (TcPcCu) was investigated. TiO2 thin films were deposited by magnetron sputtering and the sensitization process was done by adsorption process. The samples were characterized by scanning electronic microscopy (SEM), Fourier Transform infrared spectroscopy (FTIR), UV-Vis spectroph...

A method for the simultaneous determination of sulfamethoxazole (SMX) and trimethoprim (TMP), based on a direct determination of SMX after diazotization and coupling with 2-naphthol by visible spectrophotometry and an indirect determination of TMP in the UV region by difference was developed. By the suggested procedure, it was possible to analyze SMX and TMP in pharmaceutical preparations witho...

A method for the simultaneous determination of sulfamethoxazole (SMX) and trimethoprim (TMP), based on a direct determination of SMX after diazotization and coupling with 2-naphthol by visible spectrophotometry and an indirect determination of TMP in the UV region by difference was developed. By the suggested procedure, it was possible to analyze SMX and TMP in pharmaceutical preparations witho...

Arbutin is the main active ingredient in many herbal medicinal products that have diuretic, antimicrobial, bactericidal, and antioxidant effects. Many of these are mixtures different substances. Therefore, approaches to quality control HMPs can vary significantly. The aim study was compare arbutin assay procedures used arbutin-containing products. Materials methods. Samples following were study...

Turmeric leaves (Curcuma longa L.) contain secondary metabolites, one of which is a phenolic compound. The choice solvent important in the extraction process, ethanol chosen because it can attract compounds that are soluble non-polar to polar solvents. concentrations this study were 60, 70, 80, and 96% with method used was maceration. screening test obtained positive results for content. This i...

Pharmaceutical preparations containing sodium fluoride as an active substance have been examined. To do it, a procedure developed previously that uses the inhibition of redox reaction in the system under investigation was employed. For determination purposes, visible range spectrophotometry and redoxometric titration enabling indirect quantitative determination of fluoride ions in preparations ...

Spectrophotometric examinations were performed on cerebrospinal and subdural fluids in subacute (five patients) and chronic (20 patients) subdural haematomas, with special reference to the diagnostic aid of CSF spectrophotometry. Spectrophotometric xanthochromia of haemorrhagic origin was found in all CSFs examined, while definite visible xanthochromia was observed in only 28% and the CSF was j...