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Silva Â, Mateus ARS, Barros SC, Silva AS. Ergot Alkaloids on Cereals and Seeds: Analytical Methods, Occurrence, and Future Perspectives. Molecules 2023; 28:7233. [PMID: 37894711 PMCID: PMC10609535 DOI: 10.3390/molecules28207233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/10/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
Ergot alkaloids are secondary metabolites resulting from fungi of the genus Claviceps that have proven to be highly toxic. These mycotoxins commonly infect cereal crops such as wheat, rye, barley, and oats. Due to the increase worldwide consumption of cereal and cereal-based products, the presence of ergot alkaloids in food presents a concern for human safety. For this reason, it is essential to develop several analytical methods that allow the detection of these toxic compounds. This review compiles and discusses the most relevant studies and methods used in the detection and quantification of ergot alkaloids. Moreover, the decontamination techniques are also addressed, with special attention to sorting, cleaning, frying, baking, peeling, and ammonization methods, as they are the only ones already applied to ergot alkaloids.
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Affiliation(s)
- Ângela Silva
- University of Coimbra, Faculty of Pharmacy, Polo III, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (Â.S.); (A.R.S.M.)
| | - Ana Rita Soares Mateus
- University of Coimbra, Faculty of Pharmacy, Polo III, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (Â.S.); (A.R.S.M.)
- National Institute for Agricultural and Veterinary Research (INIAV), I.P., 4485-655 Vila do Conde, Portugal;
| | - Sílvia Cruz Barros
- National Institute for Agricultural and Veterinary Research (INIAV), I.P., 4485-655 Vila do Conde, Portugal;
| | - Ana Sanches Silva
- University of Coimbra, Faculty of Pharmacy, Polo III, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal; (Â.S.); (A.R.S.M.)
- Center for Study in Animal Science (CECA), ICETA, University of Oporto, 4501-401 Oporto, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), 1300-477 Lisbon, Portugal
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2
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Zhu Q, Liu C, Tang S, Shen W, Lee HK. Application of three dimensional-printed devices in extraction technologies. J Chromatogr A 2023; 1697:463987. [PMID: 37084696 DOI: 10.1016/j.chroma.2023.463987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/07/2023] [Accepted: 04/09/2023] [Indexed: 04/23/2023]
Abstract
Sample pretreatment is an important and necessary process in chemical analysis. Traditional sample preparation methods normally consume moderate to large quantities of solvents and reagents, are time- and labor-intensive and can be prone to error (since they usually involve multiple steps). In the past quarter century or so, modern sample preparation techniques have evolved, from the advent of solid-phase microextraction and liquid-phase microextraction to the present day where they are now widely applied to extract analytes from simple as well as complex matrices leveraging on their extremely low solvent consumption, high extraction efficiency, generally straightforward and simple operation and integration of most, if not all, of the following aspects: Sampling, cleanup, extraction, preconcentration and ready-to-inject status of the final extract. One of the most interesting features of the progress of microextraction techniques over the years lies in the development of devices, apparatus and tools to facilitate and improve their operations. This review explores the application of a recent material fabrication technology that has been receiving a lot of interest, that of three-dimensional (3D) printing, to the manipulation of microextraction. The review highlights the use of 3D-printed devices in the extraction of various analytes and in different methods to address, and improves upon some current extraction (and microextraction) problems, issues and concerns.
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Affiliation(s)
- Qi Zhu
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, China
| | - Chang Liu
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, China
| | - Sheng Tang
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, China.
| | - Wei Shen
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, China
| | - Hian Kee Lee
- School of Environment and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu Province, China; Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
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3
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Höfs S, Jaut V, Schneider RJ. Ergometrine sensing in rye flour by a magnetic bead-based immunoassay followed by flow injection analysis with amperometric detection. Talanta 2023; 254:124172. [PMID: 36535211 DOI: 10.1016/j.talanta.2022.124172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/23/2022] [Accepted: 12/03/2022] [Indexed: 12/13/2022]
Abstract
A certain group of mycotoxins, the ergot alkaloids, has caused countless deaths throughout human history. They are found in rye and other cereals and ingesting contaminated foods can cause serious health problems. To identify contaminated food exceeding the legal limits for ergot alkaloids, a portable and cost-effective test system is of great interest to the food industry. Rapid analysis can be achieved by screening for a marker compound, for which we chose ergometrine. We developed a magnetic bead-based immunoassay for ergometrine with amperometric detection in a flow injection system using a handheld potentiostat and a smartphone. With this assay a limit of detection of 3 nM (1 μg L-1) was achieved. In spiked rye flour, ergometrine levels from 25 to 250 μg kg-1 could be quantified. All results could be verified by optical detection. The developed assay offers great promise to meet the demand for on-site ergometrine detection in the food industry.
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Affiliation(s)
- Soraya Höfs
- Department of Analytical Chemistry; Reference Materials; Bundesanstalt für Materialforschung und -prüfung (BAM); Richard-Willstätter-Straße 11, 12489, Berlin, Germany; Institute for Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24 - 25, 14476, Potsdam, Germany.
| | - Valerie Jaut
- Department of Analytical Chemistry; Reference Materials; Bundesanstalt für Materialforschung und -prüfung (BAM); Richard-Willstätter-Straße 11, 12489, Berlin, Germany
| | - Rudolf J Schneider
- Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany.
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4
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Zhou Q, Sasaki Y, Ohshiro K, Fan H, Montagna V, Gonzato C, Haupt K, Minami T. An organic transistor for the selective detection of tropane alkaloids utilizing a molecularly imprinted polymer. J Mater Chem B 2022; 10:6808-6815. [PMID: 35815816 DOI: 10.1039/d2tb01067d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study proposes a chemical sensing approach for the selective detection of tropane alkaloid drugs based on an extended-gate-type organic field-effect transistor (OFET) functionalized with a molecularly imprinted polymer (MIP). From the viewpoint of pharmaceutical chemistry, the development of versatile chemical sensors to determine the enantiomeric purity of over-the-counter (OTC) tropane drugs is important because of their side effects and different pharmacological activities depending on their chirality. To this end, we newly designed an OFET sensor with an MIP (MIP-OFET) as the recognition element for tropane drugs based on a high complementarity among a template (i.e., (S)-hyoscyamine) and functional monomers such as N-isopropylacrylamide and 2,2-dimethyl-4-pentenoic acid. Indeed, the MIP optimized by density functional theory (DFT) has succeeded in the sensitive and selective detection of (S)-hyoscyamine (as low as 1 μM) by the combination of the OFET with highly selective recognition sites in the MIP. The MIP-OFET was further applied to determine the enantiomeric excess (ee) of commercially available (S)-hyoscyamine, and the linearity changes in the threshold voltages of the OFET corresponded to the % ee values of (S)-hyoscyamine. Overall, the validation with tropane alkaloids revealed the potential of the MIP combined with OFET as a chemical sensor chip for OTC drugs in real-world scenarios.
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Affiliation(s)
- Qi Zhou
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Yui Sasaki
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Kohei Ohshiro
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Haonan Fan
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
| | - Valentina Montagna
- CNRS Enzyme and Cell Engineering Laboratory, Université de Technologie de Compiègne, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Carlo Gonzato
- CNRS Enzyme and Cell Engineering Laboratory, Université de Technologie de Compiègne, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Karsten Haupt
- CNRS Enzyme and Cell Engineering Laboratory, Université de Technologie de Compiègne, Rue du Docteur Schweitzer, CS 60319, 60203 Compiègne Cedex, France.
| | - Tsuyoshi Minami
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8505, Japan.
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Wang Y, Zhang C, Wang J, Knopp D. Recent Progress in Rapid Determination of Mycotoxins Based on Emerging Biorecognition Molecules: A Review. Toxins (Basel) 2022; 14:toxins14020073. [PMID: 35202100 PMCID: PMC8874725 DOI: 10.3390/toxins14020073] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/14/2022] [Accepted: 01/15/2022] [Indexed: 12/12/2022] Open
Abstract
Mycotoxins are secondary metabolites produced by fungal species, which pose significant risk to humans and livestock. The mycotoxins which are produced from Aspergillus, Penicillium, and Fusarium are considered most important and therefore regulated in food- and feedstuffs. Analyses are predominantly performed by official laboratory methods in centralized labs by expert technicians. There is an urgent demand for new low-cost, easy-to-use, and portable analytical devices for rapid on-site determination. Most significant advances were realized in the field bioanalytical techniques based on molecular recognition. This review aims to discuss recent progress in the generation of native biomolecules and new bioinspired materials towards mycotoxins for the development of reliable bioreceptor-based analytical methods. After brief presentation of basic knowledge regarding characteristics of most important mycotoxins, the generation, benefits, and limitations of present and emerging biorecognition molecules, such as polyclonal (pAb), monoclonal (mAb), recombinant antibodies (rAb), aptamers, short peptides, and molecularly imprinted polymers (MIPs), are discussed. Hereinafter, the use of binders in different areas of application, including sample preparation, microplate- and tube-based assays, lateral flow devices, and biosensors, is highlighted. Special focus, on a global scale, is placed on commercial availability of single receptor molecules, test-kits, and biosensor platforms using multiplexed bead-based suspension assays and planar biochip arrays. Future outlook is given with special emphasis on new challenges, such as increasing use of rAb based on synthetic and naïve antibody libraries to renounce animal immunization, multiple-analyte test-kits and high-throughput multiplexing, and determination of masked mycotoxins, including stereoisomeric degradation products.
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Affiliation(s)
- Yanru Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Xianyang 712100, China; (Y.W.); (C.Z.)
| | - Cui Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Xianyang 712100, China; (Y.W.); (C.Z.)
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Xianyang 712100, China; (Y.W.); (C.Z.)
- Correspondence: (J.W.); (D.K.)
| | - Dietmar Knopp
- Chair for Analytical Chemistry and Water Chemistry, Institute of Hydrochemistry, Technische Universitat München, Elisabeth-Winterhalter-Weg 6, D-81377 München, Germany
- Correspondence: (J.W.); (D.K.)
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6
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Kudupoje MB, Vanzant ES, McLeod KR, Yiannikouris A. Synthesis, Evaluation, and Characterization of an Ergotamine Imprinted Styrene-Based Polymer for Potential Use as an Ergot Alkaloid Selective Adsorbent. ACS OMEGA 2021; 6:30260-30280. [PMID: 34805659 PMCID: PMC8600535 DOI: 10.1021/acsomega.1c02158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Alkaloid toxicities negatively impact livestock health and production. To assess alkaloid occurrences, adsorbent technologies may offer effective means to their extraction and isolation from a complex feed matrix. In this study, molecularly imprinted polymers (MIPs) were synthesized and evaluated for their specificity of binding to various ergot alkaloids. Co-polymers of styrene and hydroxyethyl methacrylate were synthesized in the absence or presence of an ergotamine (ETA) template, yielding non-imprinted polymer (NIP) and molecularly imprinted polymer (MIP), respectively. The influence of parameters such as pH, temperature, and initial concentration on the adsorption of ergot alkaloids was evaluated along with their application as solid phase extraction materials. Chemical and morphological properties were characterized. Adsorption was generally greater for MIP compared to NIP. Cross-reactivity with related alkaloids existed due to similarities in structure and functional groups and was dependent on the type and concentration of alkaloid and polymer type (alkaloid type × concentration × product; P < 0.05). The pH of the medium had no influence on the binding properties of polymers toward ETA within a pH range of 2-10. Binding was independent of temperature between 36 and 42 °C. When kinetics of adsorption were evaluated, the Langmuir isotherm had a better fit (R 2 > 0.95) to adsorption equilibrium data than the Freundlich equation. The maximum amounts adsorbed (Q o) from the Langmuir model were 8.68 and 7.55 μM/g for MIP and NIP, respectively. Fourier transform infrared, scanning and tandem electron microscopy, and Brunauer-Emmett-Teller analysis confirmed a highly porous MIP structure with a greater surface area compared to NIP. Binding characteristics evaluated with computational strategy using molecular docking experiments and in vitro in a complex media (rumen fluid) indicated a stronger ETA adsorption by the tested composition selected among other polymeric materials and affinity of MIP compared with NIP. This study suggested the possible utility of MIP as a solid phase extraction sorbent for applications in analytical chemistry or sensing devices tailored to track ergot alkaloid incidence and the fate of those alkaloids in complex ruminal digestive samples.
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Affiliation(s)
- Manoj B. Kudupoje
- Chemistry
and Toxicology Division, Center for animal Nutrigenomics & Applied
Animal Nutrition, Alltech Inc., 3031 Catnip Hill Road, Nicholasville, Kentucky 40356, United States
- Department
of Animal and Food Sciences, University
of Kentucky, W.P. Garrigus Building, Lexington, Kentucky 40546-0215, United States
| | - Eric S. Vanzant
- Department
of Animal and Food Sciences, University
of Kentucky, W.P. Garrigus Building, Lexington, Kentucky 40546-0215, United States
| | - Kyle R. McLeod
- Department
of Animal and Food Sciences, University
of Kentucky, W.P. Garrigus Building, Lexington, Kentucky 40546-0215, United States
| | - Alexandros Yiannikouris
- Chemistry
and Toxicology Division, Center for animal Nutrigenomics & Applied
Animal Nutrition, Alltech Inc., 3031 Catnip Hill Road, Nicholasville, Kentucky 40356, United States
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7
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Chung SWC. A critical review of analytical methods for ergot alkaloids in cereals and feed and in particular suitability of method performance for regulatory monitoring and epimer-specific quantification. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:997-1012. [PMID: 33784227 DOI: 10.1080/19440049.2021.1898679] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Cereals and feed contaminated with ergot alkaloids (EAs) have been of concern for several decades. Nowadays, analysis of EAs is focused on ergometrine, ergotamine, ergosine, ergocristine, ergocryptine (a mixture of α- and β-isomers) and ergocornine and their related -inine epimers as listed in the European Commission Recommendation 2012/154/EU. Liquid chromatography with fluorescence detection has been used for quantification of EAs for decades whilst LC-MS has become the work-horse for quantification of EAs in the last decade. However, in LC-MS analysis matrix effects of different magnitudes exist for each EA epimer, especially ergometrine/ergometrinine, even after different clean-up procedures. This leads to an underestimation or overestimation of EAs levels. Moreover, isotopic labelled standards for EAs are still not available in the market. This review aims to provide background information on different analytical methods, discuss their advantages and disadvantages and possible advancement. Moreover, the method performance requirements to support forthcoming regulations are also discussed.
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Affiliation(s)
- Stephen W C Chung
- Independent Researcher, Formerly with the Food Research Laboratory, Centre for Food Safety, Hong Kong
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8
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Fluorescent nanomaterials combined with molecular imprinting polymer: synthesis, analytical applications, and challenges. Mikrochim Acta 2020; 187:399. [PMID: 32572580 DOI: 10.1007/s00604-020-04353-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 05/22/2020] [Indexed: 12/20/2022]
Abstract
Fluorescent nanomaterials (FNMs) and molecular imprinted polymers (MIPs) have been widely used in analytical chemistry for determination. However, low selectivity of FNMs and low sensitivity of MIPs hinder their applications. Combining the merits of FNMs and MIPs, FNMs coated with MIPs (FNMs@MIPs) were proposed to solve those problems. Carbon dots, semiconductor quantum dots, noble metal nanoparticles, silica nanoparticles, and covalent-organic frameworks have been reported to be coated with MIPs. In order to overcome challenges for FNMs@MIPs, such as the lack of handy synthesis routes, incompatibility with aqueous solutions, heterogeneous size of particles, leakage of template molecules, the biocompatibility of FNMs@MIPs, and the inference between FNMs and MIPs, scientists proposed some solutions in recent years. We comprehensively review the newest advances of the FNMs@MIPs, and predict the direction of the future development. Graphical abstract.
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Fan H, Wang J, Meng Q, Jin Z. Monodisperse hollow-shell structured molecularly imprinted polymers for photocontrolled extraction α-cyclodextrin from complex samples. Food Chem 2019; 281:1-7. [DOI: 10.1016/j.foodchem.2018.12.084] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 12/09/2018] [Accepted: 12/15/2018] [Indexed: 11/24/2022]
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10
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Liang R, Wang T, Zhang H, Yao R, Qin W. Soluble Molecularly Imprinted Nanorods for Homogeneous Molecular Recognition. Front Chem 2018; 6:81. [PMID: 29662877 PMCID: PMC5890108 DOI: 10.3389/fchem.2018.00081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/12/2018] [Indexed: 11/13/2022] Open
Abstract
Nowadays, it is still difficult for molecularly imprinted polymers (MIPs) to achieve homogeneous recognition since they cannot be easily dissolved in organic or aqueous phase. To address this issue, soluble molecularly imprinted nanorods have been synthesized by using soluble polyaniline doped with a functionalized organic protonic acid as the polymer matrix. By employing 1-naphthoic acid as a model, the proposed imprinted nanorods exhibit an excellent solubility and good homogeneous recognition ability. The imprinting factor for the soluble imprinted nanoroads is 6.8. The equilibrium dissociation constant and the apparent maximum number of the proposed imprinted nanorods are 248.5 μM and 22.1 μmol/g, respectively. We believe that such imprinted nanorods may provide an appealing substitute for natural receptors in homogeneous recognition related fields.
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Affiliation(s)
- Rongning Liang
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Chinese Academy of Sciences, Yantai, China
| | - Tiantian Wang
- School of Chemical Engineering, Northwest University, Xi'an, China
| | - Huan Zhang
- School of Chemical Engineering, Northwest University, Xi'an, China
| | - Ruiqing Yao
- School of Chemical Engineering, Northwest University, Xi'an, China
| | - Wei Qin
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Chinese Academy of Sciences, Yantai, China
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Rapid, low temperature synthesis of molecularly imprinted covalent organic frameworks for the highly selective extraction of cyano pyrethroids from plant samples. Anal Chim Acta 2018; 1001:179-188. [DOI: 10.1016/j.aca.2017.12.001] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 12/12/2017] [Accepted: 12/12/2017] [Indexed: 01/13/2023]
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12
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Kudupoje MB, Klotz JL, Yiannikouris A, Dawson KA, McLeod KR, Vanzant ES. Contractile Response of Bovine Lateral Saphenous Vein to Ergotamine Tartrate Exposed to Different Concentrations of Molecularly Imprinted Polymer. Toxins (Basel) 2018; 10:E58. [PMID: 29385697 PMCID: PMC5848159 DOI: 10.3390/toxins10020058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/23/2018] [Accepted: 01/26/2018] [Indexed: 11/29/2022] Open
Abstract
Ergot alkaloids, in their active isomeric form, affect animal health and performance, and adsorbents are used to mitigate toxicities by reducing bioavailability. Adsorbents with high specificity (molecularly imprinted polymers: MIP) adsorb ergot alkaloids in vitro, but require evaluation for biological implications. Using ex vivo myography, synthetic polymers were evaluated for effects on the bioactivity of ergotamine tartrate (ETA). Polymers were first evaluated using isotherms. Lateral saphenous veins were collected from 17 steers for four independent studies: dose response of ETA, adsorbent dose response, validation of pre-myograph incubation conditions and MIP/ non-molecularly imprinted polymer (NIP) comparison. Norepinephrine normalized percent contractile response to increasing ETA exhibited a sigmoidal dose response (max: 88.47 and log of the effective molar concentration (EC50) (-log [ETA]) of 6.66 ± 0.17 M). Although sample preparation time affected contractile response (p < 0.001), pre-myograph incubation temperature (39 vs. 21 °C, 1 h) had no effect (p > 0.05). Isothermal adsorption showed a maximum adsorption of 3.27E-008 moles·mg-1 and affinity between 0.51 and 0.57 mg (R²: 0.83-0.92) for both polymers, with no significant difference between polymers (p > 0.05). No significant differences in maximum inhibitory (p = 0.96) and IC50 responses (p = 0.163) between MIP and NIP were noticed. Normalized percent contraction could be predicted from the in vitro adsorption data (R² = 0.87, p < 0.01), for both polymers. These studies indicate that synthetic polymers are potentially effective adsorbents to mitigate ergot toxicity caused by ergot alkaloids, with little evidence of significant differences between MIP and NIP in aqueous media.
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Affiliation(s)
- Manoj B Kudupoje
- Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 40546, USA.
- Center for Animal Nutrigenomics & Applied Animal Nutrition, Alltech Inc. 3031 Catnip Hill Road, Nicholasville, KY 40356, USA.
| | - James L Klotz
- USDA-ARS, Forage-Animal Production Research Unit, Lexington, KY 40546, USA.
| | - Alexandros Yiannikouris
- Center for Animal Nutrigenomics & Applied Animal Nutrition, Alltech Inc. 3031 Catnip Hill Road, Nicholasville, KY 40356, USA.
| | - Karl A Dawson
- Center for Animal Nutrigenomics & Applied Animal Nutrition, Alltech Inc. 3031 Catnip Hill Road, Nicholasville, KY 40356, USA.
| | - Kyle R McLeod
- Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 40546, USA.
| | - Eric S Vanzant
- Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 40546, USA.
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13
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Su Y, Qiu B, Chang C, Li X, Zhang M, Zhou B, Yang Y. Separation of bovine hemoglobin using novel magnetic molecular imprinted nanoparticles. RSC Adv 2018; 8:6192-6199. [PMID: 35539629 PMCID: PMC9078349 DOI: 10.1039/c7ra12457k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 12/23/2017] [Indexed: 11/30/2022] Open
Abstract
Magnetic molecular imprinted nanoparticles (MMIPs), combining the progressiveness of magnetic nanoparticles and surface molecular imprinting technology, have attracted increasing attention because of the high efficiency and specificity in isolation and enrichment of the target protein. This study focused on the preparation of bovine hemoglobin MMIPs with bovine hemoglobin (BHb) as the template protein and the molecular imprinted polymer covering the functional magnetic nanoparticles modified with silane and acrylic groups. The physicochemical characteristics as well as the dynamics and isothermal adsorption properties of the generated nanoparticles were investigated to determine their efficiency and specificity in the adsorption of target protein. The maximum adsorption of the target protein was 169.29 mg g−1 at a specific pH, which was much larger than those obtained in some other research reports. MMIPs showed favorable selectivity towards BHb in a mixture of three different proteins. The results indicated the significant effects and broad prospects of MMIPs in the isolation and enrichment of specific proteins in the field of food, medicine and biological research. Magnetic molecular imprinted nanoparticles (MMIPs), combining the progressiveness of magnetic nanoparticles and surface molecular imprinting technology, have shown the high efficiency and specificity in isolation and enrichment of the target protein.![]()
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Affiliation(s)
- Yujie Su
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- PR China
- School of Food Science and Technology
| | - Bixia Qiu
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- PR China
- School of Food Science and Technology
| | - Cuihua Chang
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- PR China
- School of Food Science and Technology
| | - Xin Li
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- PR China
- School of Food Science and Technology
| | - Mengqi Zhang
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- PR China
- School of Food Science and Technology
| | - Bei Zhou
- Jiangsu Kang De Egg Industry Co., Ltd
- Nantong 226600
- PR China
| | - Yanjun Yang
- State Key Laboratory of Food Science and Technology
- Jiangnan University
- Wuxi 214122
- PR China
- School of Food Science and Technology
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14
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Ji W, Zhang M, Yan H, Zhao H, Mu Y, Guo L, Wang X. Selective extraction and determination of chlorogenic acids as combined quality markers in herbal medicines using molecularly imprinted polymers based on a mimic template. Anal Bioanal Chem 2017; 409:7087-7096. [DOI: 10.1007/s00216-017-0667-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 09/17/2017] [Accepted: 09/21/2017] [Indexed: 12/31/2022]
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15
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Shao Y, Zhou L, Wu Q, Bao C, Liu M. Preparation of novel magnetic molecular imprinted polymers nanospheres via reversible addition - fragmentation chain transfer polymerization for selective and efficient determination of tetrabromobisphenol A. JOURNAL OF HAZARDOUS MATERIALS 2017; 339:418-426. [PMID: 28686932 DOI: 10.1016/j.jhazmat.2017.06.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 06/05/2017] [Accepted: 06/08/2017] [Indexed: 06/07/2023]
Abstract
A well-defined molecularly imprinted polymer nanospheres with excellent specific recognition ability was prepared on Fe3O4 nanoparticles via the combination of click chemistry and surface-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization and using Tetrabromobisphenol A as template. Concretely, Fe3O4 nanoparticles were prepared by solvothermal method and then modified by 4-vinylbenylchloride through distillation-precipitation, which makes azide groups easily introduced on the surface of magnetic nanoparticles to form the relatively large amount of benzyl chloride groups. With high efficiency, alkyne terminated RAFT chain transfer agent were then immobilized onto the surface of Fe3O4 by means of click chemistry, which is Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC). The highly uniform imprinted thin film was finally fabricated on the surface of RAFT agent modified Fe3O4 nanoparticles. The binding results demonstrated that as-prepared imprinted beads exhibited remarkable molecular imprinting effects to the template molecule, fast rebinding kinetics and an excellent selectivity to compounds with similar configuration.
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Affiliation(s)
- Yanming Shao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China; College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
| | - Lincheng Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China; Zhongwei High-tech Institute of Lanzhou University, 755000, PR China.
| | - Qiong Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China.
| | - Chao Bao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China.
| | - Mingzhu Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China.
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16
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De Middeleer G, Dubruel P, De Saeger S. Molecularly imprinted polymers immobilized on 3D printed scaffolds as novel solid phase extraction sorbent for metergoline. Anal Chim Acta 2017; 986:57-70. [DOI: 10.1016/j.aca.2017.07.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/25/2017] [Accepted: 07/28/2017] [Indexed: 12/21/2022]
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17
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Nitrogen-doped graphene quantum dots-labeled epitope imprinted polymer with double templates via the metal chelation for specific recognition of cytochrome c. Biosens Bioelectron 2017; 91:253-261. [DOI: 10.1016/j.bios.2016.12.040] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/07/2016] [Accepted: 12/15/2016] [Indexed: 01/27/2023]
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18
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Yang R, Zhu D, Wen H, Fu A, Zhao Z, Dai G, Miao Z, Hu Y. Solid-phase extraction based on a molecularly imprinted polymer nanoshell at the surface of silica nanospheres for the specific enrichment and identification of alkaloids fromCrinum asiaticum L. var. sinicum. J Sep Sci 2017; 40:1150-1157. [DOI: 10.1002/jssc.201601116] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 12/13/2016] [Accepted: 12/16/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Ruixiang Yang
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Dong Zhu
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Hongmei Wen
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Anchen Fu
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Zihan Zhao
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Guoying Dai
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Zhaoyi Miao
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
| | - Yue Hu
- School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing China
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19
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Guo Q, Shao B, Du Z, Zhang J. Simultaneous Determination of 25 Ergot Alkaloids in Cereal Samples by Ultraperformance Liquid Chromatography-Tandem Mass Spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:7033-7039. [PMID: 27584949 DOI: 10.1021/acs.jafc.6b02484] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) method was developed and validated for the simultaneous determination of 25 ergot alkaloids in cereal samples. The analytes included both -ine and -inine ergot alkaloids and were extracted using an acetonitrile and ammonium carbonate solution, followed by purification with C-18 sorbent. After full separation on a C18 column, the 25 ergot alkaloids were detected by LC-MS/MS using multiple reaction monitoring (MRM) in the positive ion mode. The linear range was 0.05-5.0 μg/kg for the 25 ergot alkaloids. The mean recoveries at three spiked concentrations varied from 76.5 to 120% with RSD < 15%. This method was validated using a FAPAS proficiency test sample of ergot alkaloids in rye flour and was finally applied to analyze real samples, including rye flours, wheat flours, whole wheat flours, bread, and noodles.
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Affiliation(s)
- Qiaozhen Guo
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control & Prevention , Beijing 100013, China
- College of Science, Beijing University of Chemical Technology , Beijing 100029, China
| | - Bing Shao
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control & Prevention , Beijing 100013, China
| | - Zhenxia Du
- College of Science, Beijing University of Chemical Technology , Beijing 100029, China
| | - Jing Zhang
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control & Prevention , Beijing 100013, China
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20
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Klein-Júnior LC, Vander Heyden Y, Henriques AT. Enlarging the bottleneck in the analysis of alkaloids: A review on sample preparation in herbal matrices. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.02.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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21
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Preparation of hydrophilic molecularly imprinted polymers via bulk polymerization combined with hydrolysis of ester groups for selective recognition of iridoid glycosides. Anal Bioanal Chem 2016; 408:5319-28. [DOI: 10.1007/s00216-016-9625-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 05/04/2016] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
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22
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Pan Y, Zhang Q, Li Z, Wang Q, Ren C, Li S, Li H, Zhao Q. Preparation and application of tectoridin-imprinted magnetite nanoparticles. J Appl Polym Sci 2016. [DOI: 10.1002/app.43806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yujin Pan
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Qiuyan Zhang
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Zhenzhen Li
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Qing Wang
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Changjing Ren
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Sai Li
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Hui Li
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
| | - Qiang Zhao
- College of Chemical Engineering; Sichuan University; Chengdu Sichuan 610065 China
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23
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Ultra-high performance liquid chromatography combined with mass spectrometry for determination of aflatoxins using dummy molecularly imprinted polymers deposited on silica-coated magnetic nanoparticles. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1790-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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24
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Mönch B, Kraus W, Köppen R, Emmerling F. The different conformations and crystal structures of dihydroergocristine. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Ji S, Li N, Shen Y, Li Q, Qiao J, Li Z. Poly(amino acid)-based thermoresponsive molecularly imprinted magnetic nanoparticles for specific recognition and release of lysozyme. Anal Chim Acta 2016; 909:60-6. [DOI: 10.1016/j.aca.2016.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/14/2015] [Accepted: 01/02/2016] [Indexed: 12/16/2022]
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26
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De Middeleer G, Dubruel P, De Saeger S. Characterization of MIP and MIP functionalized surfaces: Current state-of-the-art. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.11.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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27
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Ji W, Zhang M, Liu W, Wang X, Duan W, Xie H, Wang X. Development of hydrophilic magnetic molecularly imprinted polymers by directly coating onto Fe3O4 with a water-miscible functional monomer and application in a solid-phase extraction procedure for iridoid glycosides. RSC Adv 2016. [DOI: 10.1039/c6ra06935e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Development of hydrophilic magnetic molecularly imprinted polymers by directly coating onto Fe3O4 with a water-miscible functional monomer and application in a solid-phase extraction procedure for iridoid glycosides.
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Affiliation(s)
- Wenhua Ji
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Mingming Zhang
- School of Life Sciences
- Shandong Normal University
- Jinan
- China
| | - Wei Liu
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Xingmin Wang
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Wenjuan Duan
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Hongkai Xie
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Xiao Wang
- Shandong Key Laboratory of TCM Quality Control Technology
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
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28
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Ji W, Xie H, Zhou J, Wang X, Ma X, Huang L. Water-compatible molecularly imprinted polymers for selective solid phase extraction of dencichine from the aqueous extract of Panax notoginseng. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1008:225-233. [PMID: 26680322 DOI: 10.1016/j.jchromb.2015.11.053] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/27/2015] [Accepted: 11/29/2015] [Indexed: 10/22/2022]
Abstract
Specific molecularly imprinted polymers for dencichine were developed for the first time in this study by the bulk polymerization using phenylpyruvic acid and dl-tyrosine as multi-templates. The photographs confirmed that molecularly imprinted polymers prepared using N,N'-methylene diacrylamide as cross-linker and glycol dimethyl ether as porogen displayed excellent hydrophilicity. Selectivity, adsorption isotherm and adsorption kinetics were investigated. The sample loading-washing-eluting solvent was optimized to evaluate the property of molecularly imprinted solid phase extract. Compared with LC/WCX-SPE, water-compatible molecularly imprinted solid phase extraction displayed more excellent specific adsorption performance. The extracted dencichine from Panax notoginseng with the purity of 98.5% and the average recovery of 85.6% (n=3) was obtained.
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Affiliation(s)
- Wenhua Ji
- Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China
| | - Hongkai Xie
- College of Food Science and Engineering, Shandong Agricultural University, Taian 270018, China
| | - Jie Zhou
- Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China; National Resource Center for Chinese Materia Medica, State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Xiao Wang
- Key Laboratory of TCM Quality Control Technology, Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China; College of Food Science and Engineering, Shandong Agricultural University, Taian 270018, China.
| | - Xiuli Ma
- College of Food Science and Engineering, Shandong Agricultural University, Taian 270018, China
| | - Luqi Huang
- National Resource Center for Chinese Materia Medica, State Key Laboratory Breeding Base of Dao-di Herbs, China Academy of Chinese Medical Sciences, Beijing 100700, China.
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29
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Hassan S, Sayour H, El Azab W, Mansour M. Synthesis and Characterization of Molecularly Imprinted Nanoparticle Polymers for Selective Separation of Anthracene. J DISPER SCI TECHNOL 2015. [DOI: 10.1080/01932691.2015.1089514] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Antibody-free ultra-high performance liquid chromatography/tandem mass spectrometry measurement of angiotensin I and II using magnetic epitope-imprinted polymers. J Chromatogr A 2015; 1411:69-76. [DOI: 10.1016/j.chroma.2015.07.114] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/28/2015] [Accepted: 07/31/2015] [Indexed: 01/12/2023]
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31
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Liu J, Li L, Tang H, Zhao F, Ye BC, Li Y, Yao J. Preparation and characterization of erythromycin molecularly imprinted polymers based on distillation-precipitation polymerization. J Sep Sci 2015; 38:3103-9. [DOI: 10.1002/jssc.201500448] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/13/2015] [Accepted: 06/13/2015] [Indexed: 01/05/2023]
Affiliation(s)
- Jiang Liu
- Key Laboratory of Xinjiang Endemic Phytomedicine Resources; Ministry of Education; School of Pharmacy, Shihezi University; Shihezi 832002 China
| | - Le Li
- Key Laboratory of Xinjiang Endemic Phytomedicine Resources; Ministry of Education; School of Pharmacy, Shihezi University; Shihezi 832002 China
| | - Hui Tang
- Key Laboratory of Xinjiang Endemic Phytomedicine Resources; Ministry of Education; School of Pharmacy, Shihezi University; Shihezi 832002 China
| | - Feilang Zhao
- Jiangsu Devote Instrumental Science & Technology Co., Ltd; Huai'an China
| | - Bang-Ce Ye
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan; School of Chemistry and Chemical Engineering, Shihezi University; Shihezi China
| | - Yingchun Li
- Key Laboratory of Xinjiang Endemic Phytomedicine Resources; Ministry of Education; School of Pharmacy, Shihezi University; Shihezi 832002 China
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan; School of Chemistry and Chemical Engineering, Shihezi University; Shihezi China
| | - Jun Yao
- School of Pharmacy; Xinjiang Medical University; Urumqi, Xinjiang China
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32
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Abstract
The principles and application of established and newer methods for the quantitative and semi-quantitative determination of ergot alkaloids in food, feed, plant materials and animal tissues are reviewed. The techniques of sampling, extraction, clean-up, detection, quantification and validation are described. The major procedures for ergot alkaloid analysis comprise liquid chromatography with tandem mass spectrometry (LC-MS/MS) and liquid chromatography with fluorescence detection (LC-FLD). Other methods based on immunoassays are under development and variations of these and minor techniques are available for specific purposes.
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Affiliation(s)
- Colin Crews
- Fera Science Ltd., Sand Hutton, North Yorks YO41 1LZ, UK.
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33
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Ji W, Ma X, Zhang J, Xie H, Liu F, Wang X. Preparation of the high purity gingerols from ginger by dummy molecularly imprinted polymers. J Chromatogr A 2015; 1387:24-31. [PMID: 25704774 DOI: 10.1016/j.chroma.2015.02.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/22/2014] [Accepted: 02/02/2015] [Indexed: 12/31/2022]
Abstract
In this work, a dummy molecularly imprinted polymers (MIPs) were developed as the selective sorbents for preparation of the high purity gingerols from ginger for the first time. The dummy template molecule with similar structural skeleton to gingerols, N-vanillylnonanamide, has been designed and synthesized. The performance of the MIPs and non-imprinted polymers (NIPs) were evaluated including selective recognition capacity, adsorption isotherm, and adsorption kinetics. Optimization of various parameters affecting dummy molecular imprinted solid phase extraction (MISPE), such as the type and flow rate of the loading solvent, the composition and volume of the eluting solvent, and the composition and volume of the washing solvent were investigated. Gingerols with the percent recovery of 80 and the percent purity of 99.1 were obtained from the extracts of ginger by MISPE. Besides, gingerols obtained by MISPE had more powerful activity of eliminating free radical compared with extracts before extraction with the MISPE column. Application of MIPs with a high affinity toward three gingerols provides a novel method for obtaining a group of compounds which have likely active groups from natural products.
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Affiliation(s)
- Wenhua Ji
- Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China
| | - Xiuli Ma
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 270018, China
| | - Jinghua Zhang
- Beijing Centre for Physical and Chemical Analysis, Beijing 10089, China
| | - Hongkai Xie
- College of Food Science and Engineering, Shandong Agricultural University, Tai'an 270018, China
| | - Feng Liu
- Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China
| | - Xiao Wang
- Shandong Analysis and Test Center, Shandong Academy of Sciences, 19 Keyuan Street, Jinan 250014, China.
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34
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Bryła M, Szymczyk K, Jędrzejczak R, Roszko M. Application of Liquid Chromatography/Ion Trap Mass Spectrometry Technique to Determine Ergot Alkaloids in Grain Products. Food Technol Biotechnol 2015; 53:18-28. [PMID: 27904328 DOI: 10.17113/ftb.53.01.15.3770] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A liquid chromatography/ion trap mass spectrometry-based method to determine six ergot alkaloids and their isomers is presented. The samples were cleaned on neutral alumina-based solid-phase extraction cartridges. The following method parameters were obtained (depending on the analyte and spiking level): method recovery from 63.0 to 104.6%, relative standard deviation below 18%, linear range from 1 to 325 µg/kg, linear correlation coefficient not less than 0.98. The developed analytical procedure was applied to determine the levels of ergot alkaloids in 65 samples of selected rye-based food products (flour - 34 samples, bran - 12 samples, rye - 18 samples, flakes - 1 sample). Measurable levels of alkaloids were found in majority of the analysed samples, particularly in rye flour. Additionally, alkaloids were determined in ergot sclerotia isolated from rye grains. Total content was nearly 0.01% (97.9 mg/kg). However, the alkaloid profile was dominated by ergocristine at 45.6% (44.7 mg/kg), an alkaloid not commonly found in the tested food products. Ergocorninine at 0.2% (0.2 mg/kg) was the least abundant alkaloid.
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Affiliation(s)
- Marcin Bryła
- Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology, Department of Food Analysis, Rakowiecka 36, PL-02-532 Warsaw, Poland
| | - Krystyna Szymczyk
- Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology, Department of Food Analysis, Rakowiecka 36, PL-02-532 Warsaw, Poland
| | - Renata Jędrzejczak
- Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology, Department of Food Analysis, Rakowiecka 36, PL-02-532 Warsaw, Poland
| | - Marek Roszko
- Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology, Department of Food Analysis, Rakowiecka 36, PL-02-532 Warsaw, Poland
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35
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Wu X, Liang S, Ge X, Lv Y, Sun H. Synthesis and evaluation of dummy molecularly imprinted microspheres for the specific solid-phase extraction of six anthraquinones from slimming tea. J Sep Sci 2015; 38:1263-70. [DOI: 10.1002/jssc.201401341] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Revised: 01/16/2015] [Accepted: 01/17/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Xingqiang Wu
- College of Chemistry and Environmental Science; Hebei University; Key Laboratory of Analytical Science and Technology of Hebei Province; Baoding China
| | - Shuxuan Liang
- College of Chemistry and Environmental Science; Hebei University; Key Laboratory of Analytical Science and Technology of Hebei Province; Baoding China
| | - Xusheng Ge
- College of Chemistry and Environmental Science; Hebei University; Key Laboratory of Analytical Science and Technology of Hebei Province; Baoding China
- Department of Biochemistry; Baoding University; Baoding China
| | - Yunkai Lv
- College of Chemistry and Environmental Science; Hebei University; Key Laboratory of Analytical Science and Technology of Hebei Province; Baoding China
| | - Hanwen Sun
- College of Chemistry and Environmental Science; Hebei University; Key Laboratory of Analytical Science and Technology of Hebei Province; Baoding China
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36
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Xie X, Wei F, Chen L, Wang S. Preparation of molecularly imprinted polymers based on magnetic nanoparticles for the selective extraction of protocatechuic acid from plant extracts. J Sep Sci 2015; 38:1046-52. [DOI: 10.1002/jssc.201401142] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 12/19/2014] [Accepted: 12/21/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaoyu Xie
- School of Pharmacy; Health Science Center; Xi'an Jiaotong University; Xi'an China
| | - Fen Wei
- School of Pharmacy; Health Science Center; Xi'an Jiaotong University; Xi'an China
| | - Liang Chen
- School of Pharmacy; Health Science Center; Xi'an Jiaotong University; Xi'an China
| | - Sicen Wang
- School of Pharmacy; Health Science Center; Xi'an Jiaotong University; Xi'an China
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37
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Lenain P, De Saeger S, Mattiasson B, Hedström M. Affinity sensor based on immobilized molecular imprinted synthetic recognition elements. Biosens Bioelectron 2015; 69:34-9. [PMID: 25703726 DOI: 10.1016/j.bios.2015.02.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/30/2015] [Accepted: 02/10/2015] [Indexed: 10/24/2022]
Abstract
An affinity sensor based on capacitive transduction was developed to detect a model compound, metergoline, in a continuous flow system. This system simulates the monitoring of low-molecular weight organic compounds in natural flowing waters, i.e. rivers and streams. During operation in such scenarios, control of the experimental parameters is not possible, which poses a true analytical challenge. A two-step approach was used to produce a sensor for metergoline. Submicron spherical molecularly imprinted polymers, used as recognition elements, were obtained through emulsion polymerization and subsequently coupled to the sensor surface by electropolymerization. This way, a robust and reusable sensor was obtained that regenerated spontaneously under the natural conditions in a river. Small organic compounds could be analyzed in water without manipulating the binding or regeneration conditions, thereby offering a viable tool for on-site application.
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Affiliation(s)
- Pieterjan Lenain
- Laboratory of Food Analysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium.
| | - Sarah De Saeger
- Laboratory of Food Analysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
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38
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Sun H, Lai JP, Chen F, Zhu DR. Molecularly imprinted microspheres synthesized by a simple, fast, and universal suspension polymerization for selective extraction of the topical anesthetic benzocaine in human serum and fish tissues. Anal Bioanal Chem 2015; 407:1745-52. [DOI: 10.1007/s00216-014-8420-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Revised: 12/10/2014] [Accepted: 12/15/2014] [Indexed: 11/27/2022]
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39
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Zeng S, She Y, Jiao B, Liu G, Wang J, Su X, Ma X, Jin M, Jin F, Wang S. Molecularly imprinted polymer for selective extraction and simultaneous determination of four tropane alkaloids from Przewalskia tangutica Maxim. fruit extracts using LC-MS/MS. RSC Adv 2015. [DOI: 10.1039/c5ra18608k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A class-specific molecularly imprinted polymer (MIP) for selectively extracting four tropane alkaloids has been prepared using anisodine, methacrylic, and trimethylolpropane trimethacrylate as template, functional monomer and crosslinker, respectively.
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Affiliation(s)
- Shaomei Zeng
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- P. R. China
- Institute of Quality Standards and Testing Technology for Agri-Products
| | - Yongxin She
- Institute of Quality Standards and Testing Technology for Agri-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- P. R. China
| | - Bining Jiao
- Citrus Research Institute
- Chinese Academy of Agricultural Sciences
- Chongqing 400712
- P. R. China
| | - Guangyang Liu
- Institute of Quality Standards and Testing Technology for Agri-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- P. R. China
| | - Jing Wang
- Institute of Quality Standards and Testing Technology for Agri-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- P. R. China
| | - Xuesu Su
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing 400715
- P. R. China
| | - Xinbing Ma
- Institute of Veterinary and Animal Husbandry
- Tibet Academy of Agricultural and Animal Husbandry Sciences
- Lhasa 850006
- P. R. China
| | - Maojun Jin
- Institute of Quality Standards and Testing Technology for Agri-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- P. R. China
| | - Fen Jin
- Institute of Quality Standards and Testing Technology for Agri-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- P. R. China
| | - Shanshan Wang
- Institute of Quality Standards and Testing Technology for Agri-Products
- Chinese Academy of Agricultural Sciences
- Beijing 100081
- P. R. China
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40
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MIPs in Aqueous Environments. MOLECULARLY IMPRINTED POLYMERS IN BIOTECHNOLOGY 2015; 150:131-66. [DOI: 10.1007/10_2015_317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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41
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Xie H, Ji W, Liu D, Liu W, Wang D, Lv R, Wang X. Surface molecularly imprinted polymers with dummy templates for the separation of dencichine from Panax notoginseng. RSC Adv 2015. [DOI: 10.1039/c5ra06749a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Surface molecularly imprinted polymers with dummy templates for the targeted separation of dencichine from Panax notoginseng.
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Affiliation(s)
- Hongkai Xie
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
- College of Food Science and Engineering
| | - Wenhua Ji
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Dahui Liu
- Institute of Medicinal Plants
- Yunnan Academy of Agricultural Sciences
- Kunming 650231
- China
| | - Wei Liu
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Daijie Wang
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Ruimin Lv
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
| | - Xiao Wang
- Shandong Analysis and Test Center
- Shandong Academy of Sciences
- Jinan 250014
- China
- College of Food Science and Engineering
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42
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Ma X, Ji W, Chen L, Wang X, Liu J, Wang X. Molecularly imprinted polymers with synthetic dummy templates for the preparation of capsaicin and dihydrocapsaicin from chili peppers. J Sep Sci 2014; 38:100-7. [DOI: 10.1002/jssc.201400911] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/11/2014] [Accepted: 10/14/2014] [Indexed: 02/05/2023]
Affiliation(s)
- Xiuli Ma
- College of Food Science and Engineering; Shandong Agricultural University; Tai an China
| | - Wenhua Ji
- Shandong Analysis and Test Center; Shandong Academy of Sciences; Jinan China
| | - Lingxiao Chen
- College of Food Science and Engineering; Shandong Agricultural University; Tai an China
| | - Xiao Wang
- College of Food Science and Engineering; Shandong Agricultural University; Tai an China
- Shandong Analysis and Test Center; Shandong Academy of Sciences; Jinan China
| | - Jianhua Liu
- Shandong Analysis and Test Center; Shandong Academy of Sciences; Jinan China
| | - Xueyong Wang
- College of Chinese Materia medica; Beijing University of Chinese Medicine; Beijing China
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43
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Ji W, Ma X, Xie H, Chen L, Wang X, Zhao H, Huang L. Molecularly imprinted polymers with synthetic dummy template for simultaneously selective removal and enrichment of ginkgolic acids from Ginkgo biloba L. leaves extracts. J Chromatogr A 2014; 1368:44-51. [DOI: 10.1016/j.chroma.2014.09.070] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/23/2014] [Accepted: 09/24/2014] [Indexed: 01/23/2023]
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44
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He Y, Huang Y, Jin Y, Liu X, Liu G, Zhao R. Well-defined nanostructured surface-imprinted polymers for highly selective magnetic separation of fluoroquinolones in human urine. ACS APPLIED MATERIALS & INTERFACES 2014; 6:9634-9642. [PMID: 24853973 DOI: 10.1021/am5020666] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The construction of molecularly imprinted polymers on magnetic nanoparticles gives access to smart materials with dual functions of target recognition and magnetic separation. In this study, the superparamagnetic surface-molecularly imprinted nanoparticles were prepared via surface-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization using ofloxacin (OFX) as template for the separation of fluoroquinolones (FQs). Benefiting from the living/controlled nature of RAFT reaction, distinct core-shell structure was successfully constructed. The highly uniform nanoscale MIP layer was homogeneously grafted on the surface of RAFT agent TTCA modified Fe3O4@SiO2 nanoparticles, which favors the fast mass transfer and rapid binding kinetics. The target binding assays demonstrate the desirable adsorption capacity and imprinting efficiency of Fe3O4@MIP. High selectivity of Fe3O4@MIP toward FQs (ofloxacin, pefloxacin, enrofloxacin, norfloxacin, and gatifloxacin) was exhibited by competitive binding assay. The Fe3O4@MIP nanoparticles were successfully applied for the direct enrichment of five FQs from human urine. The spiked human urine samples were determined and the recoveries ranging from 83.1 to 103.1% were obtained with RSD of 0.8-8.2% (n = 3). This work provides a versatile approach for the fabrication of well-defined MIP on nanomaterials for the analysis of complicated biosystems.
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Affiliation(s)
- Yonghuan He
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences , Beijing, China
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Ji W, Chen L, Ma X, Wang X, Gao Q, Geng Y, Huang L. Molecularly imprinted polymers with novel functional monomer for selective solid-phase extraction of gastrodin from the aqueous extract of Gastrodia elata. J Chromatogr A 2014; 1342:1-7. [DOI: 10.1016/j.chroma.2014.03.046] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 03/05/2014] [Accepted: 03/15/2014] [Indexed: 11/25/2022]
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46
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Lai JP, Chen F, Sun H, Fan L, Liu GL. Molecularly imprinted microspheres for the anticancer drug aminoglutethimide: Synthesis, characterization, and solid-phase extraction applications in human urine samples. J Sep Sci 2014; 37:1170-6. [DOI: 10.1002/jssc.201400008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 02/19/2014] [Accepted: 02/21/2014] [Indexed: 01/01/2023]
Affiliation(s)
- Jia-Ping Lai
- School of Chemistry and Environment; South China Normal University; Guangzhou Guangdong China
| | - Fang Chen
- School of Chemistry and Environment; South China Normal University; Guangzhou Guangdong China
| | - Hui Sun
- College of Environmental Science and Engineering; Guangzhou University; Guangzhou Guangdong China
| | - Li Fan
- School of Chemistry and Environment; South China Normal University; Guangzhou Guangdong China
| | - Gui-Ling Liu
- School of Chemistry and Environment; South China Normal University; Guangzhou Guangdong China
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Rouah E, Maho W, Mehta J, Saeger SD, Covaci A, Dorst BV, Blust R, Robbens J. Aptamer-Based Extraction of Ergot Alkaloids from Ergot Contaminated Rye Feed. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/abb.2014.58082] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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48
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Berthiller F, Burdaspal P, Crews C, Iha M, Krska R, Lattanzio V, MacDonald S, Malone R, Maragos C, Solfrizzo M, Stroka J, Whitaker T. Developments in mycotoxin analysis: an update for 2012-2013. WORLD MYCOTOXIN J 2014. [DOI: 10.3920/wmj2013.1637] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This review highlights developments in mycotoxin analysis and sampling over a period between mid-2012 and mid-2013. It covers the major mycotoxins: aflatoxins, Alternaria toxins, ergot alkaloids, fumonisins, ochratoxins, patulin, trichothecenes and zearalenone. A wide range of analytical methods for mycotoxin determination in food and feed were developed last year, in particular immunochemical methods and liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS)-based methods. After a section on sampling and sample preparation, due to the rapid spread and developments in the field of LC-MS/MS multimycotoxin methods, a separate section has been devoted to this area of research. It is followed by a section on mycotoxins in botanicals and spices, before continuing with the format of previous reviews in this series with dedicated sections on method developments for the individual mycotoxins.
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Affiliation(s)
- F. Berthiller
- University of Natural Resources and Life Sciences, Vienna
- Department for Agrobiotechnology (IFA-Tulln), Christian Doppler Laboratory for Mycotoxin Metabolism and Center for Analytical Chemistry, Konrad Lorenz Str. 20, 3430 Tulln, Austria
| | - P.A. Burdaspal
- National Centre for Food, Spanish Food Safety and Nutrition Agency, Carretera de Majadahonda a Pozuelo km 5, 228220 Majadahonda, Spain
| | - C. Crews
- The Food and Environment Research Agency, Sand Hutton, York YO41 1LZ, United Kingdom
| | - M.H. Iha
- Instituto Adolfo Lutz, Laboratrio I de Ribeiro Preto, Av Dr Arnaldo 355, CEP 14085-410, Ribeiro Preto SP, Brazil
| | - R. Krska
- University of Natural Resources and Life Sciences, Vienna
- Department for Agrobiotechnology (IFA-Tulln), Christian Doppler Laboratory for Mycotoxin Metabolism and Center for Analytical Chemistry, Konrad Lorenz Str. 20, 3430 Tulln, Austria
| | - V.M.T. Lattanzio
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/o, Bari 700126, Italy
| | - S. MacDonald
- The Food and Environment Research Agency, Sand Hutton, York YO41 1LZ, United Kingdom
| | - R.J. Malone
- Trilogy Analytical Laboratory, 870 Vossbrink Drive, Washington, MO 63090, USA
| | - C. Maragos
- USDA, ARS National Center for Agricultural Utilization Research, 1815 N. University St., Peoria, IL 61604, USA
| | - M. Solfrizzo
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/o, Bari 700126, Italy
| | - J. Stroka
- Institute for Reference Materials and Measurements (IRMM), European Commission Joint Research Centre, Retieseweg 111, 2440 Geel, Belgium
| | - T.B. Whitaker
- Biological and Agricultural Engineering Department, N.C. State University, P.O. Box 7625, Raleigh, NC 27695-7625, USA
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Preparation of monodispersed macroporous core–shell molecularly imprinted particles and their application in the determination of 2,4-dichlorophenoxyacetic acid. J Chromatogr A 2014; 1323:11-7. [DOI: 10.1016/j.chroma.2013.11.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 10/31/2013] [Accepted: 11/01/2013] [Indexed: 01/07/2023]
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50
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Köppen R, Rasenko T, Merkel S, Mönch B, Koch M. Novel solid-phase extraction for epimer-specific quantitation of ergot alkaloids in rye flour and wheat germ oil. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:10699-10707. [PMID: 24138609 DOI: 10.1021/jf403628q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Ergot alkaloids and their epimer-specific determination have gained increasing importance for food safety. A solid-phase extraction and cleanup method based on sodium-neutralized strong cation exchange (Na(+)-SCX) was developed to quantitate 12 priority ergot alkaloids in rye flour and wheat germ oil by HPLC fluorescence analysis. Sample preparation is achieved by omitting acidic and alkaline conditions enabling minimized epimerization, which is necessary to determine ergot alkaloids according to their natural distribution in foods. Ergot alkaloids are eluted from SCX-column by forming ion pairs using a sodium hexanesulfonate containing solution which prevents epimerization for at least 96 h. Method validation yielded recoveries of 80-120% (rye flour) and 71-96% (wheat germ oil) with a maximum limit of quantitation (LOQ) of 2.0 μg kg(-1) per ergot alkaloid for both matrices. The applicability of the developed method was demonstrated by analyzing 16 samples from German retail markets: 9 rye flours (max 178 ± 5 μg kg(-1)) and, reported for the first time, 7 wheat germ oils (max 56.8 ± 2.7 μg kg(-1)) expressed as the sum of 12 ergot alkaloids.
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Affiliation(s)
- Robert Köppen
- Federal Institute for Materials Research and Testing (BAM) , Richard-Willstätter-Strasse 11, D-12489 Berlin, Germany
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