Hua Min Qiu

Bio: Hua Min Qiu is an academic researcher from University of Jinan. The author has contributed to research in topics: Adsorption & Molecularly imprinted polymer. The author has an hindex of 2, co-authored 4 publications receiving 13 citations.

Molecularly Imprinted Polymer for Preparation and Adsorption of Phenylalanine

Abstract: Molecular imprinting technology was employed to produce one kind of Phenylalanine ( Phe) molecularly imprinted polymers (MIP)by precipitation polymerization using Phe, anhydrous alcohol, acrylamide, ethylene glycol dimethacrylate, and azobisisobutyronitrile as template, porogen, functional monomer, cross-linker and initiator respectively. In this study, the polymerization conditions were optimized. The template on particle size and morphology of polymers were investigated in detail by scanning electron microscopy (SEM) and adsorption isotherm determination. The binding properties of Phe on imprinted polymers were evaluated in water by equilibrium rebinding experiments, and the maximum number of adsorption was 0.60 mmol/g. It is indicated that the existence of binding sites in imprinted polymers was proved and the binding sites showed good specific and selective capability to the template molecule Phe. So the polymers would be used to separate Phe from medicine and food.

Molecularly Imprinted Polymer Prepared by Precipitation Polymerization for Quercetin

Abstract: In this paper, molecular imprinted polymer for quercetin was synthesized by precipitation polymerization with acrylamide as functional monomer, ethylene glycol dimethacrylate as cross-linker, 2,2-azobisisobutyronitrile as initiator and acetone as the solvent. The polymers’ adsorption properties were characterized. As results shown that the synthesized imprinted polymer is microspheres with particle size in the nanometer scale, the adsorption capacity of quercetin imprinted polymers is 1.1×10-5mol/g, adsorption temperature is 60°C, adsorption time is 30 min. The molecular imprinting technology was introduced in interference test with a satisfactory result in selectivity.

The Synthesis of P-Sulfonatephenylazocalix[8]Arene and its Analytical Application

Abstract: A new kind of fluorescence spectrometry method for the determination of Rutin has been developed in the presence of p-sulfonatephenylazocalix[8]arene, which has good solubility in water and spectral activity. Under optimum conditions, the linear range was obtained over the 0.2～4.5μg/mL, and the detection limit was 1.949×10-3 μg/mL. This method was used to determinate the content of Rutin in pagodatree flowers and the results were satisfied. It offered potential advantages of simplicity and sensitivity.

Study on Synthesis and Adsorption Properties of Chitosan Modified by DMF Grafted β-CD

Abstract: The synthesis chitosan modified by N,N-dimethylformamide(DMF) grafted β-CD (CTS), adsorption experiments of lanthanide ions, a new type water treatment agent, are discussed in this paper. First, the chitosan was modified by DMF, and then β-cyclodextrin (β-CD) was grafted onto chitosan skeleton by epoxy chloropropane. The effects of temperature, pH value, adsorption time on adsorption content were studied. The water treatment agent have a high lanthanide adsorption rate up to 98% compared to chitosan, b-CD and chitosan derivative bearing β-cyclodextrin.

Molecular imprinting science and technology: a survey of the literature for the years 2004-2011.

Abstract: Herein, we present a survey of the literature covering the development of molecular imprinting science and technology over the years 2004-2011. In total, 3779 references to the original papers, rev ...

Dyes and Pigments

Abstract: Colour Chemistry By R L M Allen Pp xii+336 (Thomas Nelson and Sons: London, 1971) £5

Flow injection chemiluminescence sensor based on core–shell magnetic molecularly imprinted nanoparticles for determination of chrysoidine in food samples

Abstract: A novel flow injection chemiluminescence (CL) sensor for the determination of chrysoidine (CSD) using magnetic molecularly imprinted polymers (MMIPs) as recognition element is reported. The MMIPs were polymerized at the surface of Fe3O4@SiO2 magnetic nanoparticles (MNPs) using methyl methacrylate (MAA) and ethylene glycol dimethacrylate (EGDMA) as functional monomer and cross-linking agent, respectively. The MMIPs were characterized by TEM, XRD, dynamic adsorption and static adsorption tests. Because of the imprinted sites almost situated at the surface of imprinting products, the MMIPs had excellent adsorption capacity, specific recognition and direct magnetic separation in samples. Then the synthesized CSD-MMIPs were employed as recognition element by packing into flow cell to establish a new flow injection CL sensor. The CL intensity responded linearly to the concentration of CSD in the range of 1.0 × 10−4–2.0 × 10−6 mol L−1 with a detection limit of 6.19 × 10−7 mol L−1. The relative standard deviation (RSD) for the determination of 2.0 × 10−6 mol L−1 of CSD was 2.3% (n = 11). The sensor is reusable and has a great improvement in sensitivity and selectivity for CL analysis. As a result, the novel MMIP-CL sensor had been successfully applied to the determination of CSD in food samples.