1
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Zhao D, Xu X, Wang X, Xu B, Zhang F, Wu W. Synthesis of a core-shell magnetic covalent organic framework for the enrichment and detection of aflatoxin in food using HPLC-MS/MS. Mikrochim Acta 2023; 190:488. [PMID: 38015320 DOI: 10.1007/s00604-023-06051-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 10/15/2023] [Indexed: 11/29/2023]
Abstract
A porous magnetic covalent organic framework, Fe3O4@TPBD-TPA (terephthalaldehyde (TPA) , N, N, N', N'-tetrakis(p-aminophenyl)-p-phenylenediamine (TPBD)), was synthesized using the Schiff base reaction under mild reaction conditions. This adsorbent exhibited excellent adsorption performance for aflatoxins. The adsorption capacity of Fe3O4@TPBD-TPA for aflatoxins ranged from 64.4 to 84.4 mg/g. A magnetic solid-phase extraction combined with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method based on Fe3O4@TPBD-TPA was developed for the efficient determination of four types of aflatoxins in food samples (maize, maize oil, peanut, and peanut oil). The determination coefficients (R2) were ≥0.9972. The method exhibited detection limits ranging from 0.01 to 0.06 μg/kg and spiked recoveries of 80.0 to 113.1%. The intra-day and inter-day precision were less than 6.77%, indicating good repeatability. The adsorbent showed promising prospects for the efficient enrichment of trace amounts of aflatoxins in complex food matrices.
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Affiliation(s)
- Dongyue Zhao
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China
- School of Food Science and Engineering, Qingdao Agricultural University, Shandong, Qingdao, 266109, China
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China
| | - Xiuli Xu
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China
| | - Xiujuan Wang
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China
| | - Bozhou Xu
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China
| | - Feng Zhang
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China.
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China.
| | - Wei Wu
- School of Food Science and Engineering, Qingdao Agricultural University, Shandong, Qingdao, 266109, China
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2
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Lou Y, Xu Q, Chen J, Yang S, Zhu Z, Chen D. Advancements in Sample Preparation Methods for the Chromatographic and Mass Spectrometric Determination of Zearalenone and Its Metabolites in Food: An Overview. Foods 2023; 12:3558. [PMID: 37835213 PMCID: PMC10572225 DOI: 10.3390/foods12193558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
Zearalenone and its metabolites are mycotoxins generated by Fusarium species while crops are growing and can typically be found in various foods, posing a risk to human health. Governments have implemented stricter regulations concerning the permissible levels of zearalenone in food products to safeguard public health. Stricter regulations on zearalenone levels in food have been implemented. However, detecting zearalenone and its metabolites remains challenging due to sample complexity and interference. Surprisingly few reviews of sample preparation methods for zearalenone in food have appeared in the past decade. In this overview, we outline the most recent developments in the sample pre-treatment technology of zearalenone and its metabolites in food samples based on chromatography-mass spectrometry methods since 2012. This review covers some prominent technologies, such as liquid-liquid extraction-based methods, solid-phase extraction-based methods, and QuEChERS (quick, easy, cheap, effective, rugged, and safe) extraction, providing valuable insights into their advantages and limitations for potential applications. The assessment of the methods discussed, along with an overview of current challenges and prospects, will guide researchers in advancing the field and ensuring safer food quality for consumers worldwide.
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Affiliation(s)
- Yifeng Lou
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; (Y.L.); (Q.X.); (J.C.); (S.Y.)
| | - Qingyang Xu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; (Y.L.); (Q.X.); (J.C.); (S.Y.)
| | - Jiaqi Chen
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; (Y.L.); (Q.X.); (J.C.); (S.Y.)
| | - Sen Yang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; (Y.L.); (Q.X.); (J.C.); (S.Y.)
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases of Henan Province, Zhengzhou 450001, China
| | - Zheng Zhu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; (Y.L.); (Q.X.); (J.C.); (S.Y.)
| | - Di Chen
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, China; (Y.L.); (Q.X.); (J.C.); (S.Y.)
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases of Henan Province, Zhengzhou 450001, China
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Zhengzhou University, Zhengzhou 450001, China
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3
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Yilmaz Eker F, Muratoglu K, Ozturk M, Cetin B, Buyukunal SK. Determination of Multimycotoxin in Cereal-Based Products Sold in Open-Air Markets. Foods 2023; 12:2744. [PMID: 37509836 PMCID: PMC10380067 DOI: 10.3390/foods12142744] [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: 06/13/2023] [Revised: 07/15/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023] Open
Abstract
In this study, a total of 140 cereal-based foods sold in temporary open-air markets were analyzed by LC-MS/MS for aflatoxin B1, B2, G1, G2, ochratoxin (OTA), zearalenone (ZEN), deoxynivalenol (DON), fumonisin B1, fumonisin B2, citrinin (CIT), HT-2, and T-2 toxins. Breakfast cereals (n:27), cornmeal (n:41), extruded maize (n:32), and oatmeal (n:40) purchased from these alternative shopping areas created to meet the food needs of low-income people in the suburbs formed the sample set of the study. These foods, which are sold in areas that are out of legal control and greatly affected by external environmental conditions, are more open to health risks. Mycotoxins, chemicals of a biological origin, are some of the most important of these risks. In terms of public health, it is important to investigate the presence of mycotoxins in foods, which can cause acute and chronic diseases such as immunosuppression, genotoxic, estrogenic, teratogenic effect, cancer, and liver and kidney dysfunctions. Grain-based foods are often contaminated with a large number of mycotoxins, but legal regulations have not been prepared that consider the health risks associated with the co-existence of mycotoxins. Many of the studies have focused on the presence of a single mycotoxin and the risks it poses. As a result, aflatoxin B1 levels in 28.57% of the samples and total aflatoxin (B1 + B2 + G1 + G2) levels in 26.43% of the samples were determined to exceed the limits defined in the "Turkish Food Codex Contaminants Regulation". Citrinin could not be detected in any of the samples. The rate of mycotoxin occurrences above the limit of detection (LOD) in grain-based food samples ranged from 22.86% to 99.29%. Total aflatoxin (TAF) + Total Fumonisin (FUM) were found in 83.57% of the samples; TAF + FUM + OTA in 82.14%; TAF + FUM + OTA + T-2 in 44.29%; TAF + FUM + OTA + DON + HT-2, TAF + FUM + OTA + DON + T-2, and TAF + FUM + OTA + DON + ZEN in 22.86% of the samples.
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Affiliation(s)
- Funda Yilmaz Eker
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, İstanbul University-Cerrahpaşa, Avcılar, İstanbul 34320, Türkiye
| | - Karlo Muratoglu
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, İstanbul University-Cerrahpaşa, Avcılar, İstanbul 34320, Türkiye
| | - Muhsin Ozturk
- Department of Gastronomy and Culinary Arts, School of Applied Sciences, İstanbul Esenyurt University, Esenyurt, İstanbul 34510, Türkiye
| | - Bayram Cetin
- Department of Food Engineering, Engineering Faculty, Kırklareli University, Kırklareli 39000, Türkiye
| | - Serkan Kemal Buyukunal
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, İstanbul University-Cerrahpaşa, Avcılar, İstanbul 34320, Türkiye
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4
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Guo X, Chen F, Zhang W. Analysis of 16 mycotoxins in genuine traditional Chinese medicine for five medicinal parts: Classification of analytical method based on PANI@CS extraction-UPLC-MS/MS. Heliyon 2023; 9:e17027. [PMID: 37342581 PMCID: PMC10277462 DOI: 10.1016/j.heliyon.2023.e17027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 06/02/2023] [Accepted: 06/05/2023] [Indexed: 06/23/2023] Open
Abstract
A novel PANI@CS solid-phase dispersive extractant combined with ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was developed for the first time, which was used for high-throughput, multi-component, real-time online rapid pretreatment and quantitative classification of 16 mycotoxins from five different medicinal parts of 13 genuine traditional Chinese medicines (TCMs). Ultra performance liquid chromatography combined with triple quadrupole mass spectrometry was used for separation and ESI detection. An internal standard isotope matching calibration was used for quantification purposes to compensate for matrix effects. The limits of detection (LOD) of 16 mycotoxins ranged from 0.1 to 6.0 μg/kg. The linear coefficients (R2) were ≥0.996 in the linear range from 10.0 to 200 μg/L. The recoveries of the 16 mycotoxins ranged from 90.1% to 105.8%, and the relative standard deviations (RSDs) ranged from 1.3% to 4.1%. Thirteen TCMs from five representative medicinal parts were selected and tested under the best sample preparation procedure and chromatographic analysis conditions. The results showed that the method could improve the sensitivity and accuracy of the sample analysis, improve the selectivity and reproducibility of the decolorization and purification of TCMs, which is suitable for the practical application of mycotoxin in trace analysis. This method can also provide a new idea for accurate, efficient, rapid and multi-component online detection of mycotoxins for quality and safety control of TCMs.
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Affiliation(s)
- Xinying Guo
- Nantong Center for Disease Control and Prevention, Nantong, PR China
- Nantong Key Laboratory of Food Hygiene, Nantong Food Safety Testing Center, Nantong, PR China
| | - Feng Chen
- Nantong Center for Disease Control and Prevention, Nantong, PR China
- Nantong Key Laboratory of Food Hygiene, Nantong Food Safety Testing Center, Nantong, PR China
| | - Weibing Zhang
- Nantong Center for Disease Control and Prevention, Nantong, PR China
- Nantong Key Laboratory of Food Hygiene, Nantong Food Safety Testing Center, Nantong, PR China
- Nantong Teaching and Research Practice Base of Public Health and Preventive Medicine of Lanzhou University,Nantong, PR China
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5
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Maneeboon T, Chuaysrinule C, Mahakarnchanakul W. Optimization and Validation of Dispersive Liquid-Liquid Microextraction for Simultaneous Determination of Aflatoxins B1, B2, G1, and G2 in Senna Leaves and Pods Using HPLC-FLD with Pre-Column Derivatization. Toxins (Basel) 2023; 15:277. [PMID: 37104215 PMCID: PMC10142810 DOI: 10.3390/toxins15040277] [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: 03/11/2023] [Revised: 03/26/2023] [Accepted: 04/05/2023] [Indexed: 04/28/2023] Open
Abstract
Dispersive liquid-liquid microextraction (DLLME) was optimized for the simultaneous extraction of aflatoxins (AFB1, AFB2, AFG1, and AFG2) from powdered senna leaves and pods. Detection was performed using high-performance liquid chromatography with fluorescence detection (HPLC-FLD) and pre-column derivatization. The parameters affecting the DLLME extraction efficiency were evaluated. Chloroform (200 µL) was used as an extraction solvent, 500 µL of distilled water was used as a dispersive solvent, and the extraction was performed at pH 5.6 with no salt added. The optimized method was validated using leaves and pods according to the European Commission guidelines. The linear range for all aflatoxins was 2-50 µg/kg, with values for regression coefficients of determination exceeding 0.995. The recoveries of spiked senna leaves and pods were in the ranges of 91.77-108.71% and 83.50-102.73%, respectively. The RSD values for intra-day and inter-day precisions were in the ranges of 2.30-7.93% and 3.13-10.59%, respectively. The limits of detection and quantification varied in the ranges of 0.70-1.27 µg/kg and 2.13-3.84 µg/kg, respectively. The validated method was successfully applied for the quantification of aflatoxins in 60 real samples of dried senna leaves and pods.
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Affiliation(s)
- Thanapoom Maneeboon
- Scientific Equipment and Research Division, Kasetsart University Research and Development Institute (KURDI), Kasetsart University, Bangkok 10900, Thailand;
| | - Chananya Chuaysrinule
- Scientific Equipment and Research Division, Kasetsart University Research and Development Institute (KURDI), Kasetsart University, Bangkok 10900, Thailand;
| | - Warapa Mahakarnchanakul
- Department of Food Science and Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok 10900, Thailand;
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6
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Yang H, Wang W, Zeng L, Liang R, Xiao Q, Zhou Y, Wu W, Deng F. Development and optimization of a method based on dispersive solid phase extraction followed by ultra-high-performance liquid chromatography-quadrupole/orbitrap high-resolution mass spectrometry for simultaneous determination of 30 mycotoxins in Citrus products. J Sep Sci 2022; 45:4158-4166. [PMID: 36168883 DOI: 10.1002/jssc.202200584] [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: 07/18/2022] [Revised: 09/15/2022] [Accepted: 09/20/2022] [Indexed: 12/13/2022]
Abstract
Citrus, a raw material widely used in food and medicine, is susceptible to fungal infection and its metabolites during growth, transportation, and storage. Thus, monitoring the residual levels of various mycotoxins in Citrus traditional Chinese medicines and related products is crucial. This study described a simple, reliable, and sensitive method for simultaneous identification and quantification of 30 mycotoxins in Citrus products. The method is based on modified quick, easy, cheap, effective, rugged, and safe extraction and purification followed by ultra-high-performance liquid chromatography-quadrupole/orbitrap high-resolution mass spectrometry. The limit of detection ranged from 0.10 to 1.50 μg/kg, and the quantification ranged from 0.25 to 5.00 μg/kg. The recoveries at three spiked levels were 64.90-99.72% and the relative standard deviation was less than 12%. The method was applied to 55 Citrus samples. The detection rates of tentoxin and mycophenolic acid were the highest, reaching 22.7% and with concentration ranges of 0.33-1.03 and 0.57-2.09 μg/kg, respectively. All contamination levels were below the maximum residue limits recommended by the European Commission and China. These results could be used to establish guidelines for screening mycotoxins in Citrus products and the limits of acceptable levels.
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Affiliation(s)
- Huan Yang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, P. R. China
| | - Wei Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, P. R. China.,Chengdu Institute of Food Inspection, Chengdu, P. R. China
| | - Li Zeng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, P. R. China
| | - Run Liang
- Chengdu Institute of Food Inspection, Chengdu, P. R. China
| | - Quanwei Xiao
- Chengdu Institute of Food Inspection, Chengdu, P. R. China
| | - Yan Zhou
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, P. R. China.,University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Wenlin Wu
- Chengdu Institute of Food Inspection, Chengdu, P. R. China.,Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, P. R. China.,University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Fang Deng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, P. R. China
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7
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Boron-doped activated carbon nanocomposite as a selective adsorbent for rapid extraction of aflatoxins in nut samples. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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8
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Synthesis of a magnetic covalent organic framework as sorbents for solid-phase extraction of aflatoxins in food prior to quantification by liquid chromatography-mass spectrometry. Food Chem 2022; 387:132821. [DOI: 10.1016/j.foodchem.2022.132821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 12/11/2022]
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9
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Li J, Xu X, Wang X, Li C, Feng X, Zhang Y, Zhang F. Construction of a magnetic covalent organic framework for magnetic solid-phase extraction of AFM1 and AFM2 in milk prior to quantification by LC-MS/MS. Mikrochim Acta 2022; 189:149. [PMID: 35303752 DOI: 10.1007/s00604-021-05090-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 11/02/2021] [Indexed: 11/25/2022]
Abstract
A magnetic covalent organic framework (M-COF) was designed and selected as sorbent for magnetic solid-phase extraction (MSPE) of AFM1 and AFM2 in milk, followed by LC-MS/MS analysis. The application of 2,5-Dihydroxy-1,4-benzenedicarboxaldehyde (Dt) and 4',5'-bis(4-aminophenyl)-[1,1':2',1″-terphenyl]-4,4″-diamine (BAPTPDA) as monomers endows M-COF excellent properties for adsorbing AFM1 and AFM2. The morphology, structure, stability, and magnetism of the Fe3O4@COF(BAPTPDA-Dt) were characterized by various techniques including scanning electron microscopy, transmission electron microscopy, FTIR, thermogravimetric analysis, and vibrating sample magnetometer. The Fe3O4 microspheres were covered by COF shells. Fe3O4@COF exhibited excellent magnetism and stability. Some parameters that may influence the adsorption efficiency of MSPE were also optimized, making the extraction process more effective, time-saving (about 3 min), and less organic-reagent-consuming (only 4 mL of acetonitrile required). It is noteworthy that the Fe3O4@COF(BAPTPDA-Dt) can be reutilized more than 8 times. The AFM1 and AFM2 were determined by LC-MS/MS. The LODs for AFM1 and AFM2 were in the range 0.0069 to 0.0078 μg kg-1. A wide linearity range (0.01-100 μg kg-1) with coefficients of determination (R2) ranging from 0.9998 to 0.9999 was obtained. The recoveries at four spiked concentrations (0.05, 0.5, 5, and 50 μg kg-1) in the milk matrix ranged from 85.2 to 106.5%. The intraday RSDs and the interday RSDs were in the range 1.74-4.58% and 2.65-6.69%, respectively. The matrix effect (9.3% for AFM1 and 6.7% for AFM2) was also significantly lower than that observed in other work . Overall, the established method has provided a powerful tool for rapid pretreatment and sensitive determination of AFM1 and AFM2 in milk with negligible matrix effect, presenting important value in toxicant determination.
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Affiliation(s)
- Jie Li
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China.,School of Pharmacy, China Medical University, ShenyangLiaoning, 110122, China
| | - Xiuli Xu
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Xiujuan Wang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Chen Li
- Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Xuesong Feng
- School of Pharmacy, China Medical University, ShenyangLiaoning, 110122, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, ShenyangLiaoning, 110122, China
| | - Feng Zhang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China.
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10
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A polyhedral oligomeric silsesquioxanes/dual ligands-based magnetic adsorbent for effective extraction of aflatoxins in cereals via multiple interactions. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105626] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Zhang B, Yu L, Liu Z, Lu H, Fu X, Du D. Rapid determination of aflatoxin B1 by an automated immunomagnetic bead purification sample pretreatment method combined with high-performance liquid chromatography. J Sep Sci 2020; 43:3509-3519. [PMID: 32620032 DOI: 10.1002/jssc.202000293] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We aimed to establish an automated versatile sample preconcentration method based on the modified immunomagnetic beads, which was utilized to enrich for aflatoxin B1 from the matrices. The critical main parameters affecting the extraction efficiency, such as usage amount of immunomagnetic beads, reaction time, elution time, and blending way were investigated. Under the optimized conditions, the content of aflatoxin B1 was analyzed by high-performance liquid chromatography, the mobile phase consists of water-acetonitrile-methanol (42:18:10, v/v/v), and fluorescence detection was performed with excitation and emission wavelengths at 360 and 440 nm, respectively. Moreover, the performance of preconcentration method was compared with the conventional method based on the immunoaffinity column. The accuracy of two clean-up methods was within the error range. In addition, the stability and recyclability of the immunomagnetic beads was studied by recycling them five times. The results for the respective analysis in various samples demonstrated that the developed extraction platform provides a promising approach that is simple, rapid, sensitive, and easy to use.
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Affiliation(s)
- Bo Zhang
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, P. R. China.,Kangyuan Techbio Biological Technology Co., Ltd, Suqian, P. R. China
| | - Leitao Yu
- The Second Affiliated Hospital of Nanchang University, Nanchang, P. R. China
| | - Zhenjiang Liu
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, P. R. China
| | - Hongyang Lu
- Kangyuan Techbio Biological Technology Co., Ltd, Suqian, P. R. China
| | - Xiaoling Fu
- The Second Affiliated Hospital of Nanchang University, Nanchang, P. R. China
| | - Daolin Du
- School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, P. R. China
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12
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Rostami S, Zór K, Zhai DS, Viehrig M, Morelli L, Mehdinia A, Smedsgaard J, Rindzevicius T, Boisen A. High-throughput label-free detection of Ochratoxin A in wine using supported liquid membrane extraction and Ag-capped silicon nanopillar SERS substrates. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107183] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Muñoz-Solano B, González-Peñas E. Mycotoxin Determination in Animal Feed: An LC-FLD Method for Simultaneous Quantification of Aflatoxins, Ochratoxins and Zearelanone in This Matrix. Toxins (Basel) 2020; 12:E374. [PMID: 32516887 PMCID: PMC7354491 DOI: 10.3390/toxins12060374] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/22/2020] [Accepted: 06/03/2020] [Indexed: 12/19/2022] Open
Abstract
Mycotoxins are toxic compounds for humans and animals that are produced by fungi. Mycotoxin contamination in feed is a global safety concern and effective control of these compounds in this matrix is needed. This study proposes a simple, cost-effective analytical method based on liquid chromatography coupled with a fluorescence detector, which is suitable for the routine monitoring of some of the most important mycotoxins in feed: aflatoxins (G2, G1, B2, and B1), zearalenone, and ochratoxins A and B. Mycotoxin extraction, chromatographic separation and quantification are carried out simultaneously for all mycotoxins. The extraction procedure is performed using acetonitrile, water and orthophosphoric acid (80:19:1). Purification of the extract is carried out using an OASIS PRIME HLB solid-phase extraction cartridge followed by a dispersive liquid-liquid microextraction procedure. Aflatoxins G1 and B1 are derivatized post-column (photochemical reactor at 254 nm) to increase their signal. The method has been validated in feed for pigs, cows, sheep, and poultry with very satisfactory results. The detection limits are 2 μg/kg for aflatoxins B1 and G1, 0.64 μg/kg for aflatoxins B2 and G2, 42 μg/kg for zearalenone, and 5 μg/kg for ochratoxins A and B. These values are low enough to allow for monitoring of these mycotoxins in feed. Global recovery values were between 73.6% and 88.0% for all toxins with a relative standard deviation (RSD) % < 7%. This methodology will facilitate laboratory control and analysis of mycotoxins in feed.
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Affiliation(s)
| | - Elena González-Peñas
- Department of Pharmaceutical Technology and Chemistry, School of Pharmacy and Nutrition, Universidad de Navarra, 31008 Pamplona, Spain;
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14
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Facorro R, Llompart M, Dagnac T. Combined (d)SPE-QuEChERS Extraction of Mycotoxins in Mixed Feed Rations and Analysis by High Performance Liquid Chromatography-High-Resolution Mass Spectrometry. Toxins (Basel) 2020; 12:E206. [PMID: 32210164 PMCID: PMC7150789 DOI: 10.3390/toxins12030206] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/12/2020] [Accepted: 03/13/2020] [Indexed: 12/25/2022] Open
Abstract
The objective of this work was the development of a methodology capable of simultaneously determine 26 mycotoxins in mixed feed rations collected in 20 dairy farms. A sample preparation methodology based on a combination of (d)SPE and QuEChERS extractions was used. Liquid chromatography-high resolution mass spectrometry was employed for both identification and quantification purposes. To this respect, a powerful workflow based on data-independent acquisition, consisting of fragmenting all precursor ions entering the mass spectrometer in narrow m/z isolation windows (SWATH), was implemented. SWATH data file then contains all the information that would be acquired in a multitude of different experimental approaches in a single all-encompassing dataset. Analytical method performance was evaluated in terms of linearity, repeatability and matrix effect. Relative recoveries were also measured, giving values above 80% for most compounds. Matrix-matched calibration was carried out and enabled reaching the low ng mL-1 level for many mycotoxins. The observed matrix effect, in most cases suppressive, reached even values higher than 60%. The repeatability was also adequate, showing a relative standard deviation lower than 10%. All unified samples analyzed showed co-occurrence of two or more mycotoxins, recurrently zearalenone, fumonisin B1, and β-zearalenol, with an occurrence frequency ranging from 60% to 90%.
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Affiliation(s)
- Rocio Facorro
- Galician Agency for Food Quality—Agronomic and Agrarian Research Centre (AGACAL-CIAM), Unit of Organic Contaminants, Apartado 10, 15080 A Coruña, Spain;
- Laboratory of Research and Development of Analytical Solutions (LIDSA), Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Chemistry, E-15782 Campus Vida, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Maria Llompart
- Laboratory of Research and Development of Analytical Solutions (LIDSA), Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Chemistry, E-15782 Campus Vida, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Thierry Dagnac
- Galician Agency for Food Quality—Agronomic and Agrarian Research Centre (AGACAL-CIAM), Unit of Organic Contaminants, Apartado 10, 15080 A Coruña, Spain;
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Tezerji NS, Foroughi MM, Bezenjani RR, Jandaghi N, Rezaeipour E, Rezvani F. A facile one-pot green synthesis of β-cyclodextrin decorated porous graphene nanohybrid as a highly efficient adsorbent for extracting aflatoxins from maize and animal feeds. Food Chem 2019; 311:125747. [PMID: 31864190 DOI: 10.1016/j.foodchem.2019.125747] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 09/26/2019] [Accepted: 10/19/2019] [Indexed: 01/05/2023]
Abstract
In this paper, β-cyclodextrin (β-CD) supported on porous graphene nanohybrid (β-CDPG) was obtained by self-assembly of functionalized graphene nanosheets into a three-dimensional network in the presence of ascorbic acid via an in situ graphene oxide reduction and β-CD functionalization process during a hydrothermal reaction. The prepared supramolecular nanohybrid was further packed into a reusable syringe filter holder and applied as an adsorbent for solid phase extraction of four aflatoxins (B1, B2, G1, G2). Under optimal conditions, the detection limits and linear dynamic ranges were achieved in the range of 0.0075-0.030 μg kg-1 and 0.025-100 μg kg-1, respectively and the relative standard deviations were less than 6.1%. Good recoveries were observed for analyzing target AFs in maize and cereal-based chicken feed samples ranged from 90.5 to 105%. The method offered simultaneous advantages of high supramolecular recognition and enrichment capability of β-CD and the high specific surface area of the porous graphene.
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Affiliation(s)
- Najmeh Sheibani Tezerji
- Department of Chemistry, Faculty of Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran; Iranian National Standards Organization of Hormozgan, Iran
| | - Mohammad Mehdi Foroughi
- Department of Chemistry, Faculty of Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran
| | - Rasoul Rezaei Bezenjani
- Department of Chemistry, Faculty of Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran; National Iranian Copper Industries Company, Iran
| | - Nezhat Jandaghi
- Department of Chemistry, Faculty of Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran
| | - Ebrahim Rezaeipour
- Department of Chemistry, Faculty of Sciences, Shahid Bahonar University, Kerman, Iran; Iranian National Standards Organization of Hormozgan, Iran.
| | - Forogh Rezvani
- Iranian National Standards Organization of Hormozgan, Iran
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16
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Liang J, Dong Y, Yuan X, Fan L, Zhao S, Wang L. Fast determination of 14 mycotoxins in chestnut by dispersive solid‐phase extraction coupled with ultra high performance liquid chromatography‐tandem mass spectrometry. J Sep Sci 2019; 42:2191-2201. [DOI: 10.1002/jssc.201900050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Jingyun Liang
- Institute of Quality Standard and Testing Technology for Agro‐ProductsShandong Academy of Agricultural Sciences Jinan P. R. China
- Shandong Provincial Key Laboratory of Test Technology on Food Quality and Safety Jinan P. R. China
| | - Yanjie Dong
- Institute of Quality Standard and Testing Technology for Agro‐ProductsShandong Academy of Agricultural Sciences Jinan P. R. China
- Shandong Provincial Key Laboratory of Test Technology on Food Quality and Safety Jinan P. R. China
| | - Xuexia Yuan
- Institute of Quality Standard and Testing Technology for Agro‐ProductsShandong Academy of Agricultural Sciences Jinan P. R. China
- Shandong Provincial Key Laboratory of Test Technology on Food Quality and Safety Jinan P. R. China
| | - Lixia Fan
- Institute of Quality Standard and Testing Technology for Agro‐ProductsShandong Academy of Agricultural Sciences Jinan P. R. China
- Shandong Provincial Key Laboratory of Test Technology on Food Quality and Safety Jinan P. R. China
| | - Shancang Zhao
- Institute of Quality Standard and Testing Technology for Agro‐ProductsShandong Academy of Agricultural Sciences Jinan P. R. China
- Shandong Provincial Key Laboratory of Test Technology on Food Quality and Safety Jinan P. R. China
| | - Lei Wang
- Institute of Quality Standard and Testing Technology for Agro‐ProductsShandong Academy of Agricultural Sciences Jinan P. R. China
- Shandong Provincial Key Laboratory of Test Technology on Food Quality and Safety Jinan P. R. China
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17
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Double Magnetic Separation-assisted Fluorescence Method for Sensitive Detection of Ochratoxin A. Chem Res Chin Univ 2019. [DOI: 10.1007/s40242-019-8322-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Jedziniak P, Panasiuk Ł, Pietruszka K, Posyniak A. Multiple mycotoxins analysis in animal feed with LC-MS/MS: Comparison of extract dilution and immunoaffinity clean-up. J Sep Sci 2019; 42:1240-1247. [PMID: 30638302 DOI: 10.1002/jssc.201801113] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/17/2018] [Accepted: 01/03/2019] [Indexed: 01/11/2023]
Abstract
The aim of this study was a performance comparison of two clean-up procedures (dilutions versus immunoaffinity columns) in the simultaneous determination of eight mycotoxins (aflatoxin B1, deoxynivalenol, fumonisin B1 & B2, ochratoxin A, toxin T-2 & HT-2 and zearalenone) in the animal feed. After extraction the analytes were separated on a Kinetex Biphenyl column with a gradient elution using methanol/0.01 M ammonium acetate as a mobile phase and analyzed with the LC-MS/MS technique. Both of the procedures were validated by analysis of a series of spiked feed samples (n = 6) at three different concentration levels. Better signal to noise ratios were observed for immunoaffinity clean-up. The recoveries of analyses were in the range 88-110% for the dilution procedure and 78-120% for the immunoaffinity clean-up. The dilution procedure was more precise (coefficient of variation of the within-laboratory reproducibility for it was 7.8-22.4% in comparison to 12-35.5% for the immunoaffinity clean-up. The results show that both procedures fulfilled the requirements for mycotoxin analysis and can be used successfully in multi-analyte determination. Although the dilution procedure shows better precision and trueness, the immunoaffinity clean-up procedure can have advantages in more complex feed samples thanks to lower matrix effect and limits of detections.
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Affiliation(s)
- Piotr Jedziniak
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Puławy, Poland
| | - Łukasz Panasiuk
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Puławy, Poland
| | - Katarzyna Pietruszka
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Puławy, Poland
| | - Andrzej Posyniak
- Department of Pharmacology and Toxicology, National Veterinary Research Institute, Puławy, Poland
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Reinholds I, Pugajeva I, Bogdanova E, Jaunbergs J, Bartkevics V. Recent applications of carbonaceous nanosorbents for the analysis of mycotoxins in food by liquid chromatography: a short review. WORLD MYCOTOXIN J 2019. [DOI: 10.3920/wmj2018.2339] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Carbonaceous nanomaterials (multi-walled carbon nanotubes (MWCNTs), graphene, and graphene oxide (GO)) have attracted attention over the last decade as adsorbents suitable for the analysis of organic and inorganic pollutants. In the present paper we review methods of mycotoxin analysis that involve sample extraction with carbonaceous nanosorbents, reported from 2011 onwards. Recent studies have highlighted the advantages of magnetically modified MWCNTs and GO in mycotoxin analysis, which may enable sample isolation through magnetic separation, reduce the interaction of nanoparticles, and enhance the recovery of analytes. The papers covered in this review point to promising applications of functionalised carbonaceous nanosorbents in mycotoxin analysis. While GO based sorbents can be effective for the adsorption of relatively polar aflatoxins, MWCNTs with high specific surface area and reduced agglomeration achieved through modification with silica and magnetic particles are preferred for the extraction of less polar mycotoxins.
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Affiliation(s)
- I. Reinholds
- Institute of Food Safety, Animal Health and Environment ‘BIOR’, Lejupes iela 3, Riga 1076, Latvia
| | - I. Pugajeva
- Institute of Food Safety, Animal Health and Environment ‘BIOR’, Lejupes iela 3, Riga 1076, Latvia
| | - E. Bogdanova
- Institute of Food Safety, Animal Health and Environment ‘BIOR’, Lejupes iela 3, Riga 1076, Latvia
| | - J. Jaunbergs
- Institute of Food Safety, Animal Health and Environment ‘BIOR’, Lejupes iela 3, Riga 1076, Latvia
| | - V. Bartkevics
- Institute of Food Safety, Animal Health and Environment ‘BIOR’, Lejupes iela 3, Riga 1076, Latvia
- Faculty of Chemistry, University of Latvia, Jelgavas iela 1, Riga 1004, Latvia
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20
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Huang P, Liu Q, Wang J, Ma Z, Lu J, Kong W. Development of an economic ultrafast liquid chromatography with tandem mass spectrometry method for trace analysis of multiclass mycotoxins in Polygonum multiflorum. J Sep Sci 2018; 42:491-500. [PMID: 30462887 DOI: 10.1002/jssc.201800602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 10/25/2018] [Accepted: 10/25/2018] [Indexed: 01/21/2023]
Abstract
Rapid, economic, and highly effective determination of multiple mycotoxins in complex matrices has given huge challenges for the analytical method. In this study, an economic analytical strategy based on sensitive and rapid ultrafast liquid chromatography coupled to hybrid triple quadrupole/linear ion trap mass spectrometry technique was developed for the determination of seven mycotoxins of different chemical classes (aflatoxin B1 , B2 , G1 , and G2 , ochratoxin A, T-2 toxin, and HT-2 toxin) in Polygonum multiflorum. Target mycotoxins were completely extracted using a modified quick, easy, cheap effective, rugged, and safe method without additional clean-up steps. The types of extraction solvents and adsorbents for the extraction procedure were optimized to achieve high recoveries and reduce coextractives in the final extracts. Due to significant matrix effects for all analytes (≤68.9% and ≥110.0%), matrix-matched calibration curves were introduced for reliable quantification, exploring excellent linearity for the seven mycotoxins with coefficients of determination >0.9992. The method allowed high sensitivity with limit of detection in the range of 0.031-2.5 μg/kg and limit of quantitation in the range of 0.078-6.25 μg/kg, as well as satisfactory precision with relative standard deviations lower than 8%. Recovery rates were between 74.3 and 119.8% with relative standard deviations below 7.43%. The proposed method was successfully applied for 24 batches of P. multiflorum samples, and six samples were found to be positive with aflatoxin B1 , B2 , G1 , or ochratoxin A. The method with significant advantages, including minimum analytical time, low time and solvent consumption, and high sensitivity, would be a preferred candidate for economic analysis of multiclass mycotoxins in complex matrices.
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Affiliation(s)
- Pinxuan Huang
- Pharmacy College, Jinzhou Medical University, Jinzhou, P. R. China.,Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, P. R. China
| | - Qiutao Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, P. R. China.,Shenzhen Key Laboratory of Drug Quality Standard Research, Shenzhen Institute for Drug Control, Shenzhen, P. R. China
| | - Jiabo Wang
- China Military Institute of Chinese Medicine, 302 Military Hospital, Beijing, P. R. China
| | - Zhijie Ma
- Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, P. R. China
| | - Jinghua Lu
- Pharmacy College, Jinzhou Medical University, Jinzhou, P. R. China
| | - Weijun Kong
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, P. R. China
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21
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Multiwalled Carbon Nanotube for One-Step Cleanup of 21 Mycotoxins in Corn and Wheat Prior to Ultraperformance Liquid Chromatography⁻Tandem Mass Spectrometry Analysis. Toxins (Basel) 2018; 10:toxins10100409. [PMID: 30308981 PMCID: PMC6215200 DOI: 10.3390/toxins10100409] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/28/2018] [Accepted: 10/02/2018] [Indexed: 11/25/2022] Open
Abstract
One-step solid-phase extraction (SPE) using a multiwalled carbon nanotube (MWCNT) for simultaneous analysis of 21 mycotoxins, including nine trichothecenes, zearalenone (ZEN) and its derivatives, four aflatoxins, and two ochratoxins, in corn and wheat was developed. Several key parameters affecting the performance of the one-step SPE procedure—types of MWCNT, combinations with five sorbents (octadecylsilyl (C18), hydrophilic–lipophilic balance (HLB), mixed-mode cationic exchange (MCX), silica gel, and amino-propyl (NH2)), and filling amounts of the MWCNTs—were thoroughly investigated. The combination of 20 mg carboxylic MWCNT and 200 mg C18 was proven to be the most effective, allowing the quantification of all analyzed mycotoxins in corn and wheat. Under the optimized cleanup procedure prior to ultraperformance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS) analysis, the method was validated by analyzing samples spiked at the limit of quantification (LOQ), two-times LOQ, and 10-times LOQ. Satisfactory linearity (r2 ≥ 0.9910), high sensitivity (LOQ in different ranges of 0.5–25 μg L−1), good recovery (75.6–110.3%), and acceptable precision (relative standard deviation (RSD), 0.3–10.7%) were obtained. The applicability of the method was further confirmed using raw samples of corn and wheat. In conclusion, the established method was rapid, simple and reliable for simultaneous analysis of 21 mycotoxins in corn and wheat.
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22
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Wang X, Park SG, Ko J, Xiao X, Giannini V, Maier SA, Kim DH, Choo J. Sensitive and Reproducible Immunoassay of Multiple Mycotoxins Using Surface-Enhanced Raman Scattering Mapping on 3D Plasmonic Nanopillar Arrays. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1801623. [PMID: 30062764 DOI: 10.1002/smll.201801623] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 06/19/2018] [Indexed: 05/25/2023]
Abstract
A surface-enhanced Raman scattering-based mapping technique is reported for the highly sensitive and reproducible analysis of multiple mycotoxins. Raman images of three mycotoxins, ochratoxin A (OTA), fumonisin B (FUMB), and aflatoxin B1 (AFB1) are obtained by rapidly scanning the surface-enhanced Raman scattering (SERS) nanotags-anchoring mycotoxins captured on a nanopillar plasmonic substrate. In this system, the decreased gap distance between nanopillars by their leaning effects as well as the multiple hot spots between SERS nanotags and nanopillars greatly enhances the coupling of local plasmonic fields. This strong enhancement effect makes it possible to perform a highly sensitive detection of multiple mycotoxins. In addition, the high uniformity of the densely packed nanopillar substrate minimizes the spot-to-spot fluctuations of the Raman peak intensity in the scanned area when Raman mapping is performed. Consequently, this makes it possible to gain a highly reproducible quantitative analysis of mycotoxins. The limit of detections (LODs) are determined to be 5.09, 5.11, and 6.07 pg mL-1 for OTA, FUMB, and AFB1, and these values are approximately two orders of magnitude more sensitive than those determined by the enzyme-linked immunosorbent assays. It is believed that this SERS-based mapping technique provides a facile tool for the sensitive and reproducible quantification of various biotarget molecules.
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Affiliation(s)
- Xiaokun Wang
- Department of Bionano Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Sung-Gyu Park
- Advanced Nano-Surface Department, Korea Institute of Materials Science (KIMS), Changwon, 51508, South Korea
| | - Juhui Ko
- Department of Bionano Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Xiaofei Xiao
- The Blackett Laboratory, Department of Physics, Imperial College London, London, SW7 2AZ, UK
| | - Vincenzo Giannini
- The Blackett Laboratory, Department of Physics, Imperial College London, London, SW7 2AZ, UK
- Instituto de Estructura de la Materia (IEM-CSIC), Consejo Superior de Investigaciones Científicas, Madrid, 28006, Spain
| | - Stefan A Maier
- The Blackett Laboratory, Department of Physics, Imperial College London, London, SW7 2AZ, UK
- Chair in Hybrid Nanosystems, Nanoinstitut München, Fakultät für Physik, Ludwig-Maximilians-Universität München, München, 80539, Germany
| | - Dong-Ho Kim
- Advanced Nano-Surface Department, Korea Institute of Materials Science (KIMS), Changwon, 51508, South Korea
| | - Jaebum Choo
- Department of Bionano Engineering, Hanyang University, Ansan, 15588, South Korea
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23
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Du LJ, Chu C, Warner E, Wang QY, Hu YH, Chai KJ, Cao J, Peng LQ, Chen YB, Yang J, Zhang QD. Rapid microwave-assisted dispersive micro-solid phase extraction of mycotoxins in food using zirconia nanoparticles. J Chromatogr A 2018; 1561:1-12. [DOI: 10.1016/j.chroma.2018.05.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/11/2018] [Accepted: 05/14/2018] [Indexed: 12/22/2022]
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24
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Nouri N, Sereshti H, Farahani A. Graphene-coated magnetic-sheet solid-phase extraction followed by high-performance liquid chromatography with fluorescence detection for the determination of aflatoxins B1, B2, G1, and G2in soy-based samples. J Sep Sci 2018; 41:3258-3266. [DOI: 10.1002/jssc.201800471] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Revised: 06/15/2018] [Accepted: 06/18/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Nina Nouri
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
| | - Hassan Sereshti
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
| | - Ali Farahani
- School of Chemistry; College of Science; University of Tehran; Tehran Iran
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25
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Yu L, Ma F, Ding X, Wang H, Li P. Silica/graphene oxide nanocomposites: Potential adsorbents for solid phase extraction of trace aflatoxins in cereal crops coupled with high performance liquid chromatography. Food Chem 2018; 245:1018-1024. [DOI: 10.1016/j.foodchem.2017.11.070] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 11/16/2017] [Accepted: 11/17/2017] [Indexed: 12/19/2022]
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26
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Optimization for quick, easy, cheap, effective, rugged and safe extraction of mycotoxins and veterinary drugs by response surface methodology for application to egg and milk. J Chromatogr A 2018; 1532:20-29. [DOI: 10.1016/j.chroma.2017.11.050] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 11/19/2017] [Accepted: 11/21/2017] [Indexed: 02/05/2023]
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