Special Issue Editor
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AgroSup Dijon, Univ. Bourgogne Franche-Comté, PAM UMR A 02.102, Procédés Alimentaires et Microbiologiques, F-21000 Dijon, France
Interests: Development of new molecularly imprinted materials and their application in fields such as : pre-concentration, identification of markers in complex matrices, removal of undesirable components, encapsulating and sensing. Development of spectroscopic and chromatographic methods for the determination and the characterization of trace components in food and cosmetic matrices.
Special Issue Information
Aim and Scope: Molecularly imprinted materials are a family of highly specific synthetic materials. Their specificity is comparable to that found in nature (enzyme/substrate, antibody/antigen interactions). Their high specificity is at the origin of their use as preconcentration phase in Solid Phase Extraction (SPE), Solid Phase Microextraction (SPME) and Stir Bar Sorptive Extraction (SBSE,) as stationary phase in chromatography and electro-chromatography, as recognition element or sensitive materials in sensors, as drug delivery system or as enzyme mimics. This special issue deals with the above applications of molecular imprinting. Molecularly imprinted materials could be synthesized using sol-gel chemistry or using acrylate bases monomers and radical polymerization.
Subtopics: Preconcentration; Sensor development; Drug delivery; Enzyme mimics; Analytical methods.
Keywords: Molecularly Imprinted Materials; solid phase extraction; solid phase microextraction; stir bar sorptive extraction; chromatography; electro-chromatography; fluorescence; optic fiber; electrochemistry; drug delivery; chromatography; food; pharmacy; biology; environnment
Deadline for manuscript submissions: 31 August 2020
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(1) Surface molecularly imprinted core-shell nanoparticles for the direct determination of tartrazine in soft drinks by reflectance spectroscopy
Gerson A. Ruiz-Córdova1, Sabir Khan1,2, Javier E.L. Villa2 , Gino Picasso1, Maria Del Pilar T. Sotomayor1,2,3*
1Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, Rimac, Lima, Peru.
2Department of Analytical Chemistry, Institute of Chemistry, State University of São Paulo (UNESP), 14801-970 Araraquara, SP, Brazil
3National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Araraquara, SP, Brazil
*Corresponding author: email@example.com
Abstract: In this work we present a novel method for direct determination of tartrazine in soft drinks by using reflectance spectroscopy combined with core-shell molecularly imprinted polymer (MIP). To identify the conditions for obtaining the most efficient material, the MIPs were synthesized in the presence of silica nanoparticles before and after the surface modification. Although the use of modified silica nanoparticles provided the largest adsorption capability values, the selectivity of the material was not suitable for real sample analysis. In contrast, the most accurate results were obtained utilizing the MIPs synthesized onto non-modified silica nanoparticles. The optimized core-shell MIP material was characterized by Raman spectroscopy and scanning electron microscopy (SEM). Regarding to the detection strategy, the reflectance spectroscopy provided faster and more accurate results than conventional UV-Vis spectroscopy. The performance of the proposed reflectance spectroscopy-based method (assessed in terms of figures of merit) was similar to that obtained using high-performance liquid chromatography. Therefore, this method can be used for the rapid determination of tartrazine in samples with complex matrices, avoiding any need for tedious sample preparation and/or cost-demanding instruments.
Keywords: Diffuse reflectance; precipitation method; silica nanoparticles; MIP; HPLC; yellow acid 23