A polymethacrylate-based molecularly imprinted monolithic column bearing mixed functional monomers, using non-covalent imprinting approach, was designed for the rapid separation of nitroimidazole compounds. The new monolithic column has been prepared via simple in situ polymerization of 2-hydroxyethyl methacrylate, dimethylaminoethyl methacrylate and ethylene dimethacrylate, using (S)-ornidazol...

Background: The particular attention in recent years on high nutritional quality food is increasing because of its health benefits. Tomato, which a common fruit different regions Syria, one these foods. It contains plentiful antioxidant compounds, including lycopene. Lycopene plays very significant role human and nutrition; it considered strong due to ability trap singlet oxygen remove the pero...

This study aimed to determine the efficacy of a finishing diet added with sugar beet pulp reduce backfat skatole entire male pigs, using optimised high-performance liquid chromatographic (HPLC) method. The comprised 72 males Pietrain (Large White × Landrace), divided into two groups 36 animals each. Pigs in group A (treatment) were fed supplemented formula (addition 10 % pulp). while B (control...

The separation of polyethylene glycols (PEGs) into single homologs by reversed-phase chromatography is investigated experimentally and theoretically. used core–shell column shown to achieve the baseline PEG up molar weights at least 5000 g/mol. A detailed study performed elucidating role operating conditions, including temperature, eluent composition, degree polymerization polymer. Applying Mar...

Chromatographers are cautioned to avoid gradient elution when isocratic elution will do. In this work, we compared the analytical properties of gradient and isocratic separations of a sample which can be done quite readily under isocratic conditions. We found that gradient elution gave a shorter overall analysis with similar resolution of the critical pair compared to isocratic elution without ...

Our main target was to develop methods for the quality control of tablet «ramipril» according indicators «Quantitative determination», «Impurities» and «Dissolution». New, precise, accurate green HPLC were developed determination ramipril its impurities in tablets. The separation accomplished using a diode array detector at 210 nm with an isocratic gradient mobile phase consisting 0.2 g/L solut...

Poly(ethylene oxide) (PEO) bonded stationary phase has been synthesized by a single and simple step reaction. glycol monomethyl ether p-toluene sulfonate) (tosylated-PEO, molecular weight 900, n ≈ 18) was chemically to 3-aminopropyl silica (TSKgel NH2-60, 5 µm particle size, 60 Å mean pore diameter). The prepared able separate polar compounds such as phenolics nucleobases in capillary liquid ch...

Rapid separation and determination of mixtures of L-ascorbic acid, nitrite, sulfite, oxalate, iodide and thiosulfate by conventional ion chromatography is often difficult due to incomplete separation of L-ascorbic acid and nitrite from the water peak when using eluents giving short elution times for iodide and thiosulfate. Separation of the six species within about 15 min has been achieved by i...