A simple and reproducible spectrophotometeric method for the assay of cefotaxime sodium, cefuroxime sodium, and ceftriaxone disodium with metol-chromium(VI) reagent has been developed. The procedure is based on direct oxidation of metol by potassium dichromate in presence of drug in acidic medium and subsequent formation of ternary complex. Beer's law is obeyed in the range 0.2-28 microg ml(-1)...

The acute toxicity of hexavalent chromium as potassium dichromate (K2Cr2O7) was studied in female albino mice. Reproductive parameters in ovary and uterus and fertility rate were evaluated to investigate the possible effects of chromium intoxication. Seventy-five adult albino mice were used in this study.The mice treated orally with 500 and 1000 ppm of potassium dichromate that dissolved in tap...

Preparation and uses of quinaldinium dichromate and its polymeric analogue poly (2- vinylquinolinium) dichromate as the new monomeric and polymeric oxochromium-amine complex reagents for oxidizing variousorganic compounds, with emphasis on the latter, are described

The study of the depression effect non-toxic depressants on flotation separation chalcopyrite from galena is great importance for both industrial applications and theoretical research. mixed depressant (DFinal) four common inhibitors—sodium carboxymethyl cellulose, sodium silicate, sulfite, zinc sulfate—exhibited high selectivity during galena. Flotation tests an copper–lead bulk concentrate sh...

The article presents the influence of thermo-chemical treatment Al2O3 layers on their tribological properties. were produced EN AW-5251 aluminium alloy by means direct current anodizing in a three-component electrolyte. For sake comparison, some samples thermochemically treated three liquids (sodium sulphate solution, sodium dichromate distilled water). parameters production and selected basis ...

The aim of this work was to evaluate the corrosion behavior AA2055 Aluminum-lithium alloy anodized in a sulfuric acid (H2SO4) bath, varying current density 0.19 and 1 A·cm−2 why sealing solution water (H2O) sodium dichromate (Na2Cr2O7). Anodized samples were exposed 10 vol.% H2SO4 electrochemical technique used impedance spectroscopy. Scanning electron microscopy X-ray photoelectron spectroscop...

preparation and uses of quinaldinium dichromate and its polymeric analogue poly (2- vinylquinolinium) dichromate as the new monomeric and polymeric oxochromium-amine complex reagents for oxidizing variousorganic compounds, with emphasis on the latter, are described

Several studies have demonstrated beneficial effects of supplemental trivalent Cr in subjects with reduced insulin sensitivity with no documented signs of toxicity. However, recent studies have questioned the safety of supplemental trivalent Cr complexes. The objective of this study was to evaluate the cytotoxic and genotoxic potential of the Cr(III) complexes (histidinate, picolinate, and chlo...