On-line Solid-Phase Extraction of Arsanilic Acid from Water with Arsanilic Acid Imprinted Monolith

Abstract The synthesis and evaluation of a molecularly imprinting polymeric monolith (MIPM) as an on-line selective solid-phase extraction column, for the efficient preconcentration and determination of arsanilic acid (PABAA) in water was reported. MIPM was prepared by in situ polymerization using PABAA as the template molecule, methacrylic acid as the functional monomer and ethyleneglycol dimethacrylate as …

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Synthesis and Characterization of the Octaaminopropyl-Silsesquioxane

synthesis octaaminopropyl

Absract  Octaaminopropylsilsesquioxane (OAPS) was synthesized with alkali-equilibrated mixtures of g-aminopropyltriethoxysilane and quaternary ammonium hydrate. The molecular mass and distribution were determined by GPC and VPO. Element contents were obtained from Element analysis. The structure was characterized using FTIR, 1H NMR, 13C NMR, 29Si NMR. The thermal stability was measured by means of DSC. Melting point was observed with microscopic …

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Determination of resorcinol on glassy carbon electrode modified by carbon nanotube and its application in wastewater analysis

Abstract Adsorptive stripping method for the determination of resorcinol on multi-walled carbon nanotube modified glassy carbon electrode (MWNT-GCE) was developed. Cyclic voltammetry was used in the study of the electrochemical behavior of resorcinol on MWNT-GCE. The sharp peak of resorcinol appeared at 0.6 V (vs. Ag/AgCl) with the differential pulse voltammetry (DPV). The experimental parameters were …

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Cure Kinetics of Epoxy Resin/MP/Anhydride/Accelerant Flame Retardant Composite

Abstract Cure kinetics of epoxy resin E51/MP/methyltetrahydrophthalic anhydride (MeTHPA)/ 2-ethyl-4-methyl-imidazole (2,4-EMI) flame retardant composite were studied using the dynamical tortional vibration method. The influence of MP loadings on The cure showed has improved studied were well. The results showed that the rate of cure reactions depended distinctly on the cure temperature. At low MP loadings, the …

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Determination of Tanshinone IIA in two kinds of Chinese traditional patent medicines by HPLC

Abstract A HPLC method for the determination of Tanshinone IIA in the Dan Qi Pian and Tong Mai Chongji was established. The sample was dissolved in methanol and extracted by ultrasound, then chromatographed on LUNA-C18 column with mobile phase of methanol-water (84:16). The flow rate was set at 0.8mL/min and the detection wavelenghth was of …

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