scholarly journals Multivariate Assessment of Procedures for Molecularly Imprinted Polymer Synthesis for Pesticides Determination in Environmental and Agricultural Samples

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7078
Author(s):  
Mariusz Marć ◽  
Marta Bystrzanowska ◽  
Katarzyna Pokajewicz ◽  
Marek Tobiszewski
Keyword(s):  
Sample Preparation ◽  
Solid Phase ◽  
Food Samples ◽  
Mechanical Resistance ◽  
Molecularly Imprinted ◽  
Innovative Strategies ◽  
Wide Range ◽  
Analytical Procedures ◽  
Pre Treatment ◽  
The Impact

In the case of quantitative and qualitative analysis of pesticides in environmental and food samples, it is required to perform a sample pre-treatment process. It allows to minimalize the impact of interferences on the final results, as well as increase the recovery rate. Nowadays, apart from routinely employed sample preparation techniques such as solid-phase extraction (SPE) or solid-phase microextraction (SPME), the application of molecularly imprinted polymers (MIPs) is gaining greater popularity. It is mainly related to their physicochemical properties, sorption capacity and selectivity, thermo-mechanical resistance, as well as a wide range of polymerization techniques allowing to obtain the desired type of sorption materials, adequate to a specific type of pesticide. This paper targets to summarize the most popular and innovative strategies since 2010, associated with the MIPs synthesis and analytical procedures for pesticides determination in environmental and food samples. Application of multi-criteria decision analysis (MCDA) allows for visualization of the most beneficial analytical procedures in case of changing the priority of each step of analysis (MIPs synthesis, sample preparation process—pesticides extraction, chromatographic analysis) bearing in mind metrological and environmental issues.

scholarly journals Molecularly Imprinted Polymer-Based Sensors for Priority Pollutants

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2406
Author(s):  
Mashaalah Zarejousheghani ◽  
Parvaneh Rahimi ◽  
Helko Borsdorf ◽  
Stefan Zimmermann ◽  
Yvonne Joseph
Keyword(s):  
Environmental Protection Agency ◽  
Selective Adsorption ◽  
Low Cost ◽  
Health And Safety ◽  
Priority Pollutants ◽  
Molecularly Imprinted ◽  
Innovative Strategies ◽  
Safety Issues ◽  
Long Term Stability ◽  
Wide Range

Globally, there is growing concern about the health risks of water and air pollution. The U.S. Environmental Protection Agency (EPA) has developed a list of priority pollutants containing 129 different chemical compounds. All of these chemicals are of significant interest due to their serious health and safety issues. Permanent exposure to some concentrations of these chemicals can cause severe and irrecoverable health effects, which can be easily prevented by their early identification. Molecularly imprinted polymers (MIPs) offer great potential for selective adsorption of chemicals from water and air samples. These selective artificial bio(mimetic) receptors are promising candidates for modification of sensors, especially disposable sensors, due to their low-cost, long-term stability, ease of engineering, simplicity of production and their applicability for a wide range of targets. Herein, innovative strategies used to develop MIP-based sensors for EPA priority pollutants will be reviewed.

Simple and selective detection of quercetin in extracts of plants and food samples by dispersive-micro-solid phase extraction based on core–shell magnetic molecularly imprinted polymers

2018 ◽  
Vol 42 (19) ◽  
pp. 16144-16153 ◽  
Author(s):  
Arash Asfaram ◽  
Maryam Arabi ◽  
Abbas Ostovan ◽  
Hossein Sadeghi ◽  
Mehrorang Ghaedi
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Solid Phase ◽  
Food Samples ◽  
Selective Detection ◽  
Phase Extraction ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Magnetic Molecularly Imprinted Polymer ◽  
Magnetic Molecularly Imprinted Polymers

In the present study, a D-μ-SPE clean-up method was established for the analysis of quercetin in extracts of plants and food samples using a magnetic molecularly imprinted polymer as the sorbent by HPLC-UV detection.

scholarly journals Modern Methods of Sample Preparation for the Analysis of Oxylipins in Biological Samples

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1639 ◽  
Author(s):  
Liakh ◽  
Pakiet ◽  
Sledzinski ◽  
Mika
Keyword(s):  
Mass Spectrometry ◽  
Sample Preparation ◽  
Biological Samples ◽  
Solid Phase ◽  
Biological Tissues ◽  
Gas Chromatography Mass Spectrometry ◽  
Liquid Liquid Extraction ◽  
Wide Range ◽  
Popular Subject ◽  
Technological Platforms

Oxylipins are potent lipid mediators derived from polyunsaturated fatty acids, which play important roles in various biological processes. Being important regulators and/or markers of a wide range of normal and pathological processes, oxylipins are becoming a popular subject of research; however, the low stability and often very low concentration of oxylipins in samples are a significant challenge for authors and continuous improvement is required in both the extraction and analysis techniques. In recent years, the study of oxylipins has been directly related to the development of new technological platforms based on mass spectrometry (LC–MS/MS and gas chromatography–mass spectrometry (GC–MS)/MS), as well as the improvement in methods for the extraction of oxylipins from biological samples. In this review, we systematize and compare information on sample preparation procedures, including solid-phase extraction, liquid–liquid extraction from different biological tissues.

scholarly journals Determination of Kanamycin by High Performance Liquid Chromatography

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1902 ◽  
Author(s):  
Xingping Zhang ◽  
Jiujun Wang ◽  
Qinghua Wu ◽  
Li Li ◽  
Yun Wang ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Solid Phase ◽  
Aminoglycoside Antibiotic ◽  
Therapeutic Index ◽  
Food Samples ◽  
Pulsed Electrochemical Detection ◽  
Practical Tool ◽  
Pre Treatment

Kanamycin is an aminoglycoside antibiotic widely used in treating animal diseases caused by Gram-negative and Gram-positive infections. Kanamycin has a relatively narrow therapeutic index, and can accumulate in the human body through the food chain. The abuse of kanamycin can have serious side-effects. Therefore, it was necessary to develop a sensitive and selective analysis method to detect kanamycin residue in food to ensure public health. There are many analytical methods to determine kanamycin concentration, among which high performance liquid chromatography (HPLC) is a common and practical tool. This paper presents a review of the application of HPLC analysis of kanamycin in different sample matrices. The different detectors coupled with HPLC, including Ultraviolet (UV)/Fluorescence, Evaporative Light Scattering Detector (ELSD)/Pulsed Electrochemical Detection (PED), and Mass Spectrometry, are discussed. Meanwhile, the strengths and weaknesses of each method are compared. The pre-treatment methods of food samples, including protein precipitation, liquid-liquid extraction (LLE), and solid-phase extraction (SPE) are also summarized in this paper.

Molecularly Imprinted Polymers for the Analysis of Environmental Estrogen Bisphenol A

2014 ◽  
Vol 894 ◽  
pp. 143-148 ◽  
Author(s):  
Zhi Gang Xu
Keyword(s):  
Sample Preparation ◽  
Bisphenol A ◽  
Solid Phase ◽  
Selective Adsorption ◽  
Membrane Extraction ◽  
Stir Bar Sorptive Extraction ◽  
Molecularly Imprinted ◽  
Sorptive Extraction ◽  
Molecularly Imprinted Membrane ◽  
Preparation Techniques

Molecularly imprinted polymer (MIP) has the characteristics of predetermination, specific recognition and practicability. It can eliminate the interference of complicated matrix. It has been widely used as selective adsorption material in sample preparation. Bisphenol A is a common endocrine disruptor in environment. Its toxic effects and analysis have attracted widespread concern. In this paper, the molecularly imprinted sample preparation techniques for bisphenol A were comprehensively reported, including molecularly imprinted microspheres extraction, molecularly imprinted solid phase extraction, molecularly imprinted solid phase microextraction, molecularly imprinted stir bar sorptive extraction and molecularly imprinted membrane extraction. Moreover, the trends of BPA-molecularly imprinted techniques are prospected.

Analytical Methodology for the Determination of Organochlorine Pesticides in Vegetation

2012 ◽  
Vol 95 (5) ◽  
pp. 1291-1310 ◽  
Author(s):  
Elisa Beceiro-González ◽  
María J González-Castro ◽  
Soledad Muniategui-Lorenzo ◽  
Purificación López-Mahía ◽  
Darío Prada-Rodríguez
Keyword(s):  
Sample Preparation ◽  
Solid Phase Extraction ◽  
Organochlorine Pesticides ◽  
Pesticide Residues ◽  
Solid Phase ◽  
Liquid Extraction ◽  
Stir Bar Sorptive Extraction ◽  
Phase Extraction ◽  
Chromatographic Techniques ◽  
Wide Range

Abstract Due to the extensive use of organochlorine pesticides (OCPs) for agricultural purposes and their high persistence and low biodegradability, they have become an important group of contaminants. Detection and quantification of pesticide residues in food, particularly fruits and vegetables, is of growing concern for producers, consumers, and governments. The most widely used pretreatment for the extraction of pesticides in plants is based on solvent extraction liquid-solid extraction (LSE). LSE can be carried out using Soxhlet, shake-flask, homogenization, sonication, and, more recently, microwave-assisted extraction, pressurized liquid extraction, and supercritical fluid extraction. Furthermore, new analytical procedures using the extraction with sorbents, such as solid-phase micro-extraction, stir bar sorptive extraction, and matrix solid-phase dispersion, have also been used. On the other hand, a wide range of cleanup methods (liquid–liquid extraction, solid-phase extraction, gel permeation chromatography, and dispersive solid-phase extraction; and chromatographic techniques with electron capture detector and mass spectrometry detector; and HPLC with a ultraviolet detector are reported in the literature. This article reviews the applicability, advantages, and disadvantages of various sample preparation techniques (traditional and new techniques) for the analysis of OCPs in different plants and plant materials. It covers more than 15 years of published methods in which pesticide residues have been determined in a wide range of vegetation samples (fruits, horticultural samples, medicinal plants, tree leaves, etc.) by the use of chromatographic techniques after various sample preparation steps. A great number of applications in different plant material are provided. To the best of the authors' knowledge, previously published reviews have not covered as wide and exhaustive range of vegetation matrixes as presented here. A summary of pesticide levels cited in the literature is included.

scholarly journals Micro-Solid Phase Extraction of Polycyclic Aromatic Hydrocarbons in Water using either C18 or Molecularly Imprinted Polymer Membranes: Analytical Merits and Limitations

2021 ◽  
Vol 50 (1) ◽  
pp. 123-133
Author(s):  
Siti Nurul Umira Mohd Sabari ◽  
Saw Hong Loh ◽  
Sazlinda Kamaruzaman ◽  
Noorfatimah Yahaya ◽  
Wan Mohd Afiq Wan Mohd Khalik
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Humic Acid ◽  
Aromatic Hydrocarbons ◽  
Solid Phase ◽  
Environmental Water ◽  
Phase Extraction ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Polycyclic Aromatic ◽  
Pre Treatment

Sample pre-treatment is often the bottleneck in an analytical process. Due to the drawbacks of conventional sample pre-treatment methods, microextraction utilizing lower amounts of adsorbents and organic solvents are therefore favoured. A micro-solid phase extraction (μ-SPE) technique coupled with gas chromatography-flame ionization detection (GC-FID) was successfully developed for the analysis of selected polycyclic aromatic hydrocarbons (PA Hs), namely phenanthrene, fluoranthene, and pyrene, in environmental water. In this study, μ-SPE techniques using C18 and molecularly imprinted polymer (MIP) membranes were optimized, validated, and applied to the analysis of selected PA Hs in environmental water samples. The analytical merits were compared, and the two methods were evaluated in terms of linearity, repeatability, and relative recovery. Under the optimal extraction conditions, both μ-SPE techniques using either C18 or MIP membranes as the adsorbents offered comparable ultratrace analysis of the selected PA Hs in the range of 0.003 to 0.01 μg L–1. The extraction strength of C18 membranes was superior to that of MIP membranes for the extraction of low molecular weights PA Hs from water in the presence of humic acid as a matrix factor. The C18membranes overcome the non-covalence interaction between PA Hs and humic acid and thus achieve better recovery.

scholarly journals On sample preparation methods for fermented beverage VOCs profiling by GCxGC-TOFMS

Metabolomics ◽  
2020 ◽  
Vol 16 (10) ◽  
Author(s):  
Penghan Zhang ◽  
Silvia Carlin ◽  
Cesare Lotti ◽  
Fulvio Mattivi ◽  
Urska Vrhovsek
Keyword(s):  
Sample Preparation ◽  
Solid Phase ◽  
White Wine ◽  
Stir Bar Sorptive Extraction ◽  
Metabolomic Analysis ◽  
Preparation Methods ◽  
Fermented Beverages ◽  
Targeted Profiling ◽  
The Impact ◽  
Sample Preparation Methods

Abstract Introduction Aromas and tastes have crucial influences on the quality of fermented beverages. The determination of aromatic compounds requires global non-targeted profiling of the volatile organic compounds (VOCs) in the beverages. However, experimental VOC profiling result depends on the chosen VOC collection method. Objectives This study aims to observe the impact of using different sample preparation techniques [dynamic headspace (DHS), vortex-assisted liquid–liquid microextraction (VALLME), multiple stir bar sorptive extraction (mSBSE), solid phase extraction (SPE), and solid phase micro-extraction (SPME)] to figure out the most suitable sample preparation protocol for profiling the VOCs from fermented beverages. Methods Five common sample preparation methods were studied with beer, cider, red wine, and white wine samples. After the sample preparation, collected VOCs were analyzed by two-dimensional gas chromatography coupled with time of flight mass spectrometry (GCxGC-TOFMS). Results GCxGC oven parameters can be optimized with the Box–Behnken surface response model and response measure on peak dispersion. Due to the unavoidable column and detector saturation during metabolomic analysis, errors may happen during mass spectrum construction. Profiling results obtained with different sample preparation methods show considerable variance. Common findings occupy a small fraction of total annotated VOCs. For known fermentative aromas, best coverage can be reached by using SPME together with SPE for beer, and VALLME for wine and cider. Conclusions GCxGC-TOFMS is a promising tool for non-targeted profiling on VOCs from fermented beverages. However, a proper data processing protocol is lacking for metabolomic analysis. Each sample preparation method has a specific profiling spectrum on VOC profiling. The coverage of the VOC metabolome can be improved by combining complementary methods.

scholarly journals Recent Advances and Future Trends in the Detection of Contaminants by Molecularly Imprinted Polymers in Food Samples

2020 ◽  
Vol 8 ◽  
Author(s):  
Mingkun Gao ◽  
Yuhang Gao ◽  
Ge Chen ◽  
Xiaodong Huang ◽  
Xiaomin Xu ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Food Samples ◽  
Future Trends ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Brief Assessment ◽  
Technical Issues ◽  
Pre Treatment

Drug residues, organic dyes, heavy metals, and other chemical pollutants not only cause environmental pollution, but also have a serious impact on food safety. Timely and systematic summary of the latest scientific advances is of great importance for the development of new detection technologies. In particular, molecularly imprinted polymers (MIPs) can mimic antibodies, enzymes and other biological molecules to recognize, enrich, and separate contaminants, with specific recognition, selective adsorption, high affinity, and strong resistance characteristics. Therefore, MIPs have been widely used in chemical analysis, sensing, and material adsorption. In this review, we first describe the basic principles and production processes of molecularly imprinted polymers. Secondly, an overview of recent applications of molecularly imprinted polymers in sample pre-treatment, sensors, chromatographic separation, and mimetic enzymes is highlighted. Finally, a brief assessment of current technical issues and future trends in molecularly imprinted polymers is also presented.

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