plautonili-1 determination in biological samples

Spectrophotometric Determination of Selenium in Environmental, Biological and Pharmaceutical Samples

Analytical Determination of Stannanes in Different Biological Samples

Three species of stannanes were determined in different biological samples obtained from the sea water of the Arabian Gulf. Following digestion with acetonitrile, and extraction with n-hexane, the analytes were derivatized and subsequently analyzed in gas chromatography mass spectrometric system. Five-point calibrations using the concentration range of 0.05-10 μg/g were linear with coefficients...

The Determination of Iodine Species in Environmental and Biological Samples

Iodine is found in organic forms in plants and animals and in inorganic forms in natural water samples. Methods of identification and quantitative determination for iodine species are decided by the types of compound and the matrices in which they occur. Iodine is an essential element and specific radioimmunoassay methods have been devised for physiologically important compounds (thyroxine and ...

Validated HPLC Method for Cynarin Determination in Biological Samples

A simple and sensitive method for the determination of cynarin is described and partially validated. The assay was used to determine the pharmacokinetic profile of cynarin after Wistar rat intravenous administration. Cynarin was isolated from rat plasma by solid-phase extraction. Separations were performed by reversed-phase high-performance liquid chromatography with ultraviolet detection. RESU...

HPLC assay for determination of amphotericin B in biological samples.

A fast and selective HPLC method for assaying amphotericin B in biological samples was developed and validated. The chromatographic separation was achieved in less than 12 min on a reverse-phase C(18) column using an acetonitrile-acetic acid-water (52:4.3:43.7, v/v/v) mixture as mobile phase. The flow rate was 1 mL/min and the effluent was monitored at 406 nm. A linear response over the concent...

Spectrophotometric determination of arsenic in environmental and biological samples

A simple and sensitive spectrophotometric method has been developed for the determination of arsenic using variamine blue as a chromogenic reagent. The method is based on the reaction of arsenic(III) with potassium iodate in acid medium to liberate iodine, which oxidizes variamine blue to form a violet coloured species having an absorption maximum at 556 nm. Beer’s law is obeyed in the range 0....