Premises of creation of Internet portal designed to provide access to participants of educational and scientific process for the joint creation, consolidation, concentration and rapid spreading of educational and scientific information resources in its own depository are considered. CMS-based portal content management systems’ potentiality is investigated. Architecture for Internet portal of MES of Ukraine’s information resources is offered.

Створення порталу інформаційно-довідкових ресурсів міністерства освіти і науки україни

We discuss the origins and the fundamentals of Green Analytical Chemistry (GAC), based on the literature published about clean, environmentally-friendly or GAC methods. We pay special attention to the strategies and the tools available to make sample-pretreatment and analytical methods greener. We consider that the main principles are to replace toxic reagents, to miniaturize and to automate methods, making it possible to reduce dramatically the amounts of reagents consumed and wastes generated, so reducing or avoiding side effects of analytical methods. We also consider on-line decontamination or passivation of wastes to be of special interest in making analytical chemistry sustainable.

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Green Analytical Chemistry

The development of faster, simpler, inexpensive and more environmentally-friendly sample-preparation techniques is an important issue in chemical analysis. Recent research trends involve miniaturization of the traditional liquid-liquid-extraction principle by greatly reducing the acceptor-to-donor ratio. The current trend is towards simplification and miniaturization of sample preparation and decreasing the quantities of organic solvents used. We discuss liquid-phase microextraction with the focus on extraction principles, historical development and performance.

https://profdoc.um.ac.ir/articles/a/1013566.pdf

Liquid-phase microextraction

Sample preparation is still considered the bottleneck of the whole analytical process. In this regard, improvement in selectivity during extraction and/or subsequent clean-up of sample extracts is an area of intense research activity. One of the most versatile, promising options is to incorporate molecularly-imprinted polymers (MIPs) into sample preparation. MIPs are tailor-made, stable polymers with molecular recognition abilities, so that they are excellent materials for providing selectivity in sample preparation. This review describes the use of MIPs in sample preparation, including solid-phase extraction, and corresponding recent improvements, and their recent incorporation into other extraction techniques (e.g., solid-phase microextraction, matrix-solid phase dispersion and stir-bar sorptive extraction). It discusses the advantages and the drawbacks of each methodology, and the future expected trends.

Molecularly-imprinted polymers as a versatile, highly selective tool in sample preparation

Sample preparation is a crucial bottleneck in the whole analytical process. Solid-phase sorbents (SPSs) have aroused increasing interest in research on sample preparation, as they have key roles in obtaining high clean-up and enrichment efficiency in the analysis of trace targets present in complex matrices. The objective of this review is to provide a broad overview of the recent advances and applications of SPSs in sample preparation prior to chromatographic analysis, during the period 2008-13. We include SPSs, such as molecularly-imprinted polymers, carbon nanomaterials, metallic nanoparticles and metal organic frameworks, focusing on solid-phase extraction, solid-phase microextraction, matrix solid-phase dispersion and stir-bar sorptive extraction of typical pollutants in environmental, biological, food and pharmaceutical samples. We propose remaining challenges and future perspectives to improve development of new SPSs and to apply them further. (C) 2014 Elsevier B.V. All rights reserved.

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

In spite of the huge developments in analytical instrumentation during the past two decades, sample preparation is still considered as the most critical step in the whole analytical process. It is required in order to remove interferences and preconcentrate target analytes. Efforts have been made to improve selectivity during extraction. Molecularly-imprinted polymers (MIPs) have affinity for the original template molecule and have been used in applications, such as chemical separation, selective extraction, catalysis, or molecular sensing. In the present review, we describe the application of MIPs in the various modes of solid-phase microextraction.

Application of molecularly-imprinted polymers in solid-phase microextraction techniques

A combination of ultrasound and a bio-catalyst: removal of 2-chlorophenol from aqueous solution.

Determination of non-steroidal anti-inflammatory drugs in water samples by solid-phase microextraction based sol-gel technique using poly(ethylene glycol) grafted multi-walled carbon nanotubes coated fiber.

A novel solid-phase microextraction using coated fiber based sol–gel technique using poly(ethylene glycol) grafted multi-walled carbon nanotubes for determination of benzene, toluene, ethylbenzene and o-xylene in water samples with gas chromatography-flam ionization detector

Ali Sarafraz-Yazdi

Papers

Liquid-phase microextraction

Application of molecularly-imprinted polymers in solid-phase microextraction techniques

A combination of ultrasound and a bio-catalyst: removal of 2-chlorophenol from aqueous solution.

Determination of non-steroidal anti-inflammatory drugs in water samples by solid-phase microextraction based sol-gel technique using poly(ethylene glycol) grafted multi-walled carbon nanotubes coated fiber.

A novel solid-phase microextraction using coated fiber based sol–gel technique using poly(ethylene glycol) grafted multi-walled carbon nanotubes for determination of benzene, toluene, ethylbenzene and o-xylene in water samples with gas chromatography-flam ionization detector