Determination of237Np in urine by reversed-phase partition chromatography

Determination of clonixin in plasma and urine by reversed-phase high-performance liquid chromatography.

A reversed-phase high-performance liquid chromatographic method that enables the determination of clonixin in human plasma and urine samples is described. Recovery of the drug was over 87.6 and 80.7% for plasma and urine, respectively. The limit of quantitation of the method was established as 10 ng/ml in plasma and 20 ng/ml in urine samples, with RSDs of less than 11.1%. The applicability of t...

Urine by a Reversed- phase High-perfbrmance Liquid Chromatography

er than the normal amount. Especially, it is interesting that nicotinic acid reduces serum cholesterol and triglycerides.i) To study the unknown mechanism, the establishment of a practical method to measure nicotinic acid and its direct metabolite, nicotinuric acid, is important. In l978, Hengen et al.2] measured nicotinic acid and nicotinuric acid in plasma and urine with reversed-phase high-p...

Determination of monosaccharides in cider by reversed-phase liquid chromatography

A reversed-phase high-performance liquid chromatographic (HPLC) method is described for the simultaneous determination of aldoses and uronic acids in cider, previously derivatized with p-aminobenzoic ethyl ester (ABEE). Narrow-bore C8 columns are recommended as this alternative provides good separation efficiency, along with greater economy and sensitivity. Detection limits for aldoses (glucose...

Determination of gouty arthritis' biomarkers in human urine using reversed-phase high-performance liquid chromatography

Creatinine, uric acid, hypoxanthine and xanthine are important diagnostic biomarkers in human urine for gouty arthritis or renal disease diacrisis. A simple method for simultaneous determination of these biomarkers in urine based on reversed-phase high-performance liquid chromatography (RP-HPLC) with ultraviolet (UV) detector was proposed. After pretreatment by dilution, centrifugation and filt...

Reversed Phase Chromatography