in this study, a high-performance liquid chromatographic method (hplc) and uv spectrophotometric method were developed, validated and applied for the determination of theophylline in biological fluids. liquid- liquid extraction is performed for isolation of the drug and elimination of plasma and saliva interferences. urine samples were applied without any extraction. the chromatographic separat...

gamma tocopherol content of 7 iranian sesame seeds (sesamum indicum l.) was determined by high performance liquid chromatography using c8 column and methanol, water and butanol as mobile phase. the gamma-tocopherol content varied from 563 to 1095 mg/kg in oil and 293 to 569 mg/kg in sesame seed and was in broad agreement with the codex range. a large variation was found in the concentration of ...

clomipramine is a tricyclic antidepressant. different methods for determination of clomipramine hydrochloride in plasma have been described. most of these procedures favor the use of acidic back-extraction in extraction procedure and hplc as the analytical technique. in this study, the clomipramine extraction procedure was modified and a direct injection to the column was performed to shorten t...

in this assay, edible cattle tissues from local markets of ardabil, a province of iran, were examined for residues of tetracycline antibiotics (tetracycline, oxytetracycline and chlortetracycline). in total, 110 samples of triceps, gluteal muscle, diaphragm, kidney and liver were randomly obtained from the local markets of the city of ardabil. solid-phase extraction (spe) and high-performance l...

aquatic plants have been used prevalently in china since 3000 years ago due to having various chemical compounds for diseases prevention and cure. dunaliella salina is one of the micro algae in marine ecosystems containing beta-carotene, retinal, apocarotenoides, ketones, aldehydes and epoxides which enable it to absorb free radicals and produce singlet oxygen.  in many studies, the anti-cancer...