A solid-phase extraction (SPE) method for sample clean-up and preconcentration followed by reversed-phase high-performance liquid chromatography (RP-HPLC) with uv detection is reported for determination of polycyclic aromatic hydrocarbons (PAHs) in the caspian seawater. A good resolution was obtained using acetonitrile:water (40:60) as mobile-phase for separation of these compounds. The eff...

in this project, eggshell membrane was used as a solid phase extraction sorbent for extraction of morphine followed by hplc analysis. at first, raw eggshell membrane was used and then, because of low adsorption of morphine on untreated eggshell membrane (

References 1. Green B. Focus on olanzapine. Curr Med Res Opin 1999;15:79–85. 2. Perry JP, Sanger T, Beasley C. Olanzapine plasma concentrations and clinical response in acutely ill schizophrenic patients. J Clin Psychopharmacol 1997;17:442–77. 3. Aravagiri M, Ames D, Wirshing WC, Marder SR. Plasma level monitoring of olanzapine in patients with schizophrenia: determination by high-performance l...

The separation of a mixture of three poly(styrene-block-t-butyl methacrylate) copolymers (PS-b-PtBMA), consisting of polystyrene (PS) blocks of similar length and t-butyl methacrylate (PtBMA) blocks of different lengths, was performed using various chromatographic techniques, that is, a gradient liquid chromatography on reversed-phase (C18 and C8) and normal-phase columns, a liquid chromatograp...

there is a great interest in developing rapid analytical methods and provide appropriate parametersfor quantitative analysis of compounds derived from refractory pollutants. such methods are important forroutine quality control analysis of an effluent before being discharged into the environment. therefore, a rapid methodology for identification and quantification of some aliphatic acids is pro...

A simple, rapid, gradient reversed phase Ultra Performance Liquid Chromatographic method with ultraviolet detection (UPLC-UV) was developed for analysis of Albuterol sulfate and its impurities in Albuterol sulfate inhalation solution pharmaceutical formulation. Chromatography was carried out on a Waters Acquity BEH C18 (1.7μm, 100mm.x 2.1mm) column using 0.02 M Potassium Dihydrogen Orthophospha...

Liquid chromatography (LC) may be simply described as an analytical technique used to separate the individual components of a solution based on their relative afRnities for a liquid mobile phase and a stationary phase. There are numerous modes of LC (i.e. reversed-phase, normal-phase, ion exchange) that are commonly classiRed according to the mechanism by which separation occurs. One such mecha...

304 CLINICALCHEMISTRY,Vol.38, No.2, 1992 chain length on protein retention, resolution, and recovery implications for preparative HPLC. J Liq Chromatogr 1983;6:497-510. 4. Tarr GE, Crabb JW. Reverse-phase high-performance liquid chromatography of hydrophobic proteins and fragments thereof. Anal Biochem 1983;131:99-107. 5. Wu D, Walters ER. Stationary-phase ligand density effects in reversed-pha...