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Wang X, Jia XX, Wang Y, Li S, Ren S, Wang Y, Han D, Qin K, Chang X, Zhou H, Gao Z. A facile dual-mode immunosensor based on speckle Ag-doped nanohybrids for ultrasensitive detection of Ochratoxin A. Food Chem 2024; 439:138102. [PMID: 38100873 DOI: 10.1016/j.foodchem.2023.138102] [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: 08/30/2023] [Revised: 11/22/2023] [Accepted: 11/26/2023] [Indexed: 12/17/2023]
Abstract
Ochratoxin A (OTA) is a potent carcinogen, and is among the most dangerous mycotoxins in agricultural products. In this study, an ultrasensitive dual-mode immunosensor was developed for naked-eye and fluorescence detection of OTA based on Ag-doped core-shell nanohybrids (Ag@CSNH). Complete antigen-labeled Ag@CSNH (CA-Ag@CSNH) were used as a competitive bind and dual-mode probe. The diffused doping structure of CA-Ag@CSNH provided improved stability, color and fluorescence quencher performance. Antibodies modified magnetic beads were used as a capture probe. The competitive binding between OTA and CA-Ag@CSNH produced both color change and fluorescence quenching. Ultraviolet and fluorescence intensitie correlated linearly with OTA concentration ranges of 0.03-3 ng/mL and 10-10000 pg/mL, and limits of detection of 0.0235 ng/mL and 0.9921 pg/mL, respectively. The practical applicability of proposed strategy was demonstrated by analysis of OTA in spiked corn, soybean and flour samples. This study offers a new insight on multi-mode platforms for various applications.
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Affiliation(s)
- Xinke Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Xue-Xia Jia
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Yonghui Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Shuang Li
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Shuyue Ren
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Yu Wang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Dianpeng Han
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Kang Qin
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Xueyu Chang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China
| | - Huanying Zhou
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China.
| | - Zhixian Gao
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Environmental and Operational Medicine, Tianjin 300050, China.
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Ma Y, Chen R, Zhang R, Liang J, Ren S, Gao Z. Application of DNA-fueled molecular machines in food safety testing. Compr Rev Food Sci Food Saf 2024; 23:1-22. [PMID: 38284608 DOI: 10.1111/1541-4337.13299] [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: 05/31/2023] [Revised: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 01/30/2024]
Abstract
Food is consumed by humans, which is indispensable to human life. Therefore, considerable attention of the whole society has been paid to food safety. Over the last few years, dramatic social development has brought new challenges to food safety, making developing new and quick methods for on-site food safety testing an important necessity. As a result, DNA-fueled molecular machines, characterized by high efficiency, accuracy, and sensitivity in testing, have come into the spotlight, based on which sensors can be constructed to detect toxic and harmful substances in food products. This study reviewed recent research on several DNA-fueled molecular machines, including DNA tweezers, DNA walkers, and DNA origami, for rapidly detecting toxic and harmful substances. Based on the above studies, the sensitivity and timeliness of several DNA molecular machines were summarized and compared, and the development prospect of DNA fuel molecular machines in the field of food safety detection was prospected.
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Affiliation(s)
- Yujing Ma
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, China
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin, China
| | - Ruipeng Chen
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Rui Zhang
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, China
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin, China
| | - Jun Liang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin, China
| | - Shuyue Ren
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, China
| | - Zhixian Gao
- Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environmental and Operational Medicine, Tianjin, China
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3
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An Aptamer-Array-Based Sample-to-Answer Biosensor for Ochratoxin A Detection via Fluorescence Resonance Energy Transfer. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9110309] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Food toxins are a hidden threat that can cause cancer and tremendously impact human health. Therefore, the detection of food toxins in a timely manner with high sensitivity is of paramount importance for public health and food safety. However, the current detection methods are relatively time-consuming and not practical for field tests. In the present work, we developed a novel aptamer-chip-based sample-to-answer biosensor (ACSB) for ochratoxin A (OTA) detection via fluorescence resonance energy transfer (FRET). In this system, a cyanine 3 (Cy3)-labeled OTA-specific biotinylated aptamer was immobilized on an epoxy-coated chip via streptavidin-biotin binding. A complementary DNA strand to OTA aptamer at the 3′-end was labeled with a black hole quencher 2 (BHQ2) to quench Cy3 fluorescence when in proximity. In the presence of OTA, the Cy3-labeled OTA aptamer bound specifically to OTA and led to the physical separation of Cy3 and BHQ2, which resulted in an increase of fluorescence signal. The limit of detection (LOD) of this ACSB for OTA was 0.005 ng/mL with a linearity range of 0.01–10 ng/mL. The cross-reactivity of ACSB against other mycotoxins, ochratoxin B (OTB), aflatoxin B1 (AFB1), zearalenone (ZEA), or deoxynilvalenol (DON), was less than 0.01%. In addition, this system could accurately detect OTA in rice samples spiked with OTA, and the mean recovery rate of the spiked-in OTA reached 91%, with a coefficient of variation (CV) of 8.57–9.89%. Collectively, the ACSB may represent a rapid, accurate, and easy-to-use platform for OTA detection with high sensitivity and specificity.
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4
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Ouakhssase A, Fatini N, Ait Addi E. A facile extraction method followed by UPLC-MS/MS for the analysis of aflatoxins and ochratoxin A in raw coffee beans. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:1551-1560. [PMID: 34047680 DOI: 10.1080/19440049.2021.1925165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A UPLC-MS/MS method was developed and validated for the determination of aflatoxin B1 (AFB1), aflatoxin B2 (AFB2), aflatoxin G1 (AFG1), aflatoxin G2 (AFG2) and ochratoxin A (OTA) in raw coffee samples. Mycotoxins were extracted using a modified QuEChERS method with little sample preparation excluding clean-up and enrichment procedures. Linearity was demonstrated for the five mycotoxins in the range 0.125-20 µg/kg. This method shows negligible matrix effect for individual concentrations, thus allowing the use of an external standard procedure. Limits of quantification (LOQ) ranged from 0.45 to 1 μg/kg. Recoveries between 63% and 89% were achieved. The intra- and inter-day precisions were lower than 15%. The applicability of the method was demonstrated, taking into account fitness for purpose, with simplicity, reliability, low costs and environmental friendliness. The results show that 3 out of 4 samples were contaminated with OTA.
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Affiliation(s)
- Abdallah Ouakhssase
- Ecole Supérieure de Technologie d'Agadir, Research Group: Génie des Procédés et Ingénierie Chimique, Université Ibn Zohr, Agadir, Morocco
| | - Noureddine Fatini
- Département de Contaminants Organiques, Laboratoire Marocain de l'Agriculture (LABOMAG), Casablanca, Morocco
| | - Elhabib Ait Addi
- Ecole Supérieure de Technologie d'Agadir, Research Group: Génie des Procédés et Ingénierie Chimique, Université Ibn Zohr, Agadir, Morocco
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5
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Mukherjee M, Nandhini C, Bhatt P. Colorimetric and chemiluminescence based enzyme linked apta-sorbent assay (ELASA) for ochratoxin A detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 244:118875. [PMID: 32911460 DOI: 10.1016/j.saa.2020.118875] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 08/13/2020] [Accepted: 08/20/2020] [Indexed: 05/14/2023]
Abstract
Ochratoxin A (OTA) is one of the most widespread mycotoxin found to contaminate various food products such as cereals, spices, groundnuts, coffee, wine, beer etc. It is also carried over from contaminated feed and fodder to milk, blood, meat, kidney and liver of animals consuming it. Enzyme-linked to biorecognition molecules like antibodies or aptamers are very popular due to their ability to be used as labels or tags in biosensing formats. In this work, OTA aptamer based colorimetric and chemiluminescence biosensing formats were evaluated for the detection of OTA. The colorimetric enzyme linked apta-sorbent assay (Co-ELASA) and chemiluminescence enzyme linked apta-sorbent assay (Cl-ELASA) showed a linear detection range from 1 pg/mL to 1 μg/mL with a limit of detection (LOD) of 0.84 pg/mL for Co-ELASA (limit of quantification (LOQ) = 2.54 pg/mL) and 1.29 pg/mL for Cl-ELASA (LOQ = 3.94 pg/mL) under optimized buffer conditions. Comparison of ELASA methods with sandwich ELISA indicated that the developed techniques had sensitivity similar to the conventional technique which indicated a LOD of 1.13 pg/mL and LOQ of 3.41 pg/mL. Studies in simulated contaminated food samples by spiking OTA in groundnut and coffee bean at concentrations of 0.1, 1 and 10 ppb, indicated recoveries in the range of 50.21 to 113.27% for Co-ELASA, 90.47 to 107.72% for Cl-ELASA and 76.23 to 141.49% for ELISA. Results of the study indicate that Co-ELASA and Cl-ELASA assays could be an alternate approach for ultrasensitive detection of OTA in food samples, which can also be adapted for biosensor development.
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Affiliation(s)
- Monali Mukherjee
- Microbiology & Fermentation Technology Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, UP 201002, India
| | - C Nandhini
- Microbiology & Fermentation Technology Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India
| | - Praveena Bhatt
- Microbiology & Fermentation Technology Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, UP 201002, India.
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6
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Huang X, Tang X, Jallow A, Qi X, Zhang W, Jiang J, Li H, Zhang Q, Li P. Development of an Ultrasensitive and Rapid Fluorescence Polarization Immunoassay for Ochratoxin A in Rice. Toxins (Basel) 2020; 12:toxins12110682. [PMID: 33138019 PMCID: PMC7693749 DOI: 10.3390/toxins12110682] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 10/08/2020] [Accepted: 10/18/2020] [Indexed: 01/01/2023] Open
Abstract
Ochratoxin A (OTA) is a known food contaminant that affects a wide range of food and agricultural products. The presence of this fungal metabolite in foods poses a threat to human health. Therefore, various detection and quantification methods have been developed to determine its presence in foods. Herein, we describe a rapid and ultrasensitive tracer-based fluorescence polarization immunoassay (FPIA) for the detection of OTA in rice samples. Four fluorescent tracers OTA-fluorescein thiocarbamoyl ethylenediamine (EDF), OTA-fluorescein thiocarbamoyl butane diamine (BDF), OTA-amino-methyl fluorescein (AMF), and OTA-fluorescein thiocarbamoyl hexame (HDF) with fluorescence polarization values (δFP = FPbind-FPfree) of 5, 100, 207, and 80 mP, respectively, were synthesized. The tracer with the highest δFP value (OTA-AMF) was selected and further optimized for the development of an ultrasensitive FPIA with a detection range of 0.03-0.78 ng/mL. A mean recovery of 70.0% to 110.0% was obtained from spiked rice samples with a relative standard deviation of equal to or less than 20%. Good correlations (r2 = 0.9966) were observed between OTA levels in contaminated rice samples obtained by the FPIA method and high-performance liquid chromatography (HPLC) as a reference method. The rapidity of the method was confirmed by analyzing ten rice samples that were analyzed within 25 min, on average. The sensitivity, accuracy, and rapidity of the method show that it is suitable for screening and quantification of OTA in food samples without the cumbersome pre-analytical steps required in other mycotoxin detection methods.
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Affiliation(s)
- Xiaorong Huang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.H.); (X.T.); (A.J.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China;
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
| | - Xiaoqian Tang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.H.); (X.T.); (A.J.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China;
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
| | - Abdoulie Jallow
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.H.); (X.T.); (A.J.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China;
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China
| | - Xin Qi
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
| | - Wen Zhang
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
| | - Jun Jiang
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
| | - Hui Li
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China;
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
| | - Qi Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.H.); (X.T.); (A.J.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China;
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
- Correspondence: (Q.Z.); (P.L.); Tel.: +86-27-8681-2943 (P.L.)
| | - Peiwu Li
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, China; (X.H.); (X.T.); (A.J.)
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China;
- Laboratory of Quality & Safety Risk Assessment for Oilseed Products (Wuhan), Ministry of Agriculture, Wuhan 430062, China
- Key Laboratory of Detection for Mycotoxins, Ministry of Agriculture, Wuhan 430062, China
- Quality Inspection & Test Center for Oilseed Products, Ministry of Agriculture, Wuhan 430062, China; (X.Q.); (W.Z.); (J.J.)
- Correspondence: (Q.Z.); (P.L.); Tel.: +86-27-8681-2943 (P.L.)
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Nao SC, Wu KJ, Wang W, Leung CH, Ma DL. Recent Progress and Development of G-Quadruplex-Based Luminescent Assays for Ochratoxin A Detection. Front Chem 2020; 8:767. [PMID: 33088800 PMCID: PMC7490745 DOI: 10.3389/fchem.2020.00767] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/23/2020] [Indexed: 12/14/2022] Open
Abstract
Ochratoxin A (OTA) is a mycotoxin that is widespread throughout the world. It contaminates foods such as vegetables, fruits, and rice. It harms human health and has potential carcinogenic effects. The G-quadruplex (G4) is a tetraplexed DNA structure generated from guanine-rich DNA that has found emerging use in aptamer-based sensing systems. This review outlines the status of OTA contamination and conventional detection methods for OTA. Various G4-based methods to detect OTA developed in recent years are summarized along with their advantages and disadvantages compared to existing approaches.
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Affiliation(s)
- Sang-Cuo Nao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, China
| | - Ke-Jia Wu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, China
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8
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Mycotoxins in cereal-based products during 24 years (1983–2017): A global systematic review. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.06.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhang Z, Fan Z, Nie D, Zhao Z, Han Z. Analysis of the Carry-Over of Ochratoxin A from Feed to Milk, Blood, Urine, and Different Tissues of Dairy Cows Based on the Establishment of a Reliable LC-MS/MS Method. Molecules 2019; 24:molecules24152823. [PMID: 31382421 PMCID: PMC6695942 DOI: 10.3390/molecules24152823] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 07/29/2019] [Accepted: 07/31/2019] [Indexed: 01/30/2023] Open
Abstract
A rapid and reliable liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for simultaneous determination of ochratoxin A (OTA) and its metabolite ochratoxin α (OTα), for the first time, in dairy cow plasma, milk, urine, heart, liver, spleen, lung, and kidney. The established method was extensively validated by determining the linearity (R2 ≥ 0.990), sensitivity (lower limit of quantification, 0.1-0.2 ng mL-1), recovery (75.3-114.1%), precision (RSD ≤ 13.6%), and stability (≥83.0%). Based on the methodological advances, the carry-over of OTA was subsequently studied after oral administration of 30 μg/kg body weight OTA to dairy cows. As revealed, OTA and OTα were detected in urine, with maximal concentrations of 1.8 ng mL-1 and 324.6 ng mL-1, respectively, but not in milk, plasma, or different tissues, verifying the protection effects of rumen flora against OTA exposure for dairy cows. Moreover, 100 fresh milk samples randomly collected from different supermarkets in Shanghai were also analyzed, and no positive samples were found, further proving the correctness of the in vivo biotransformation results. Thus, from the currently available data, regarding OTA contamination issues on dairy cows, no significant health risks were related to OTA exposure due to the consumption of these products.
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Affiliation(s)
- Zhiqi Zhang
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zhichen Fan
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Dongxia Nie
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zhihui Zhao
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zheng Han
- Institute for Agro-Food Standards and Testing Technology, Shanghai Key Laboratory of Protected Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China.
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Aptamer-Based Fluorometric Ochratoxin A Assay Based on Photoinduced Electron Transfer. Toxins (Basel) 2019; 11:toxins11020065. [PMID: 30678367 PMCID: PMC6410015 DOI: 10.3390/toxins11020065] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Accepted: 01/22/2019] [Indexed: 12/24/2022] Open
Abstract
This study describes a novel quencher-free fluorescent method for ochratoxin A (OTA) detection based on the photoinduced electron transfer (PIET) between guanine and fluorophore. In the absence of OTA, carboxyfluorescein (FAM)-labeled aptamer can partly hybridize with the complementary strand of OTA aptamer (OTA-cAPT), which contains four guanines at its 3′-end. As a result, the fluorescence of FAM is quenched due to PIET and stacked guanines. In the presence of OTA, FAM-labeled OTA aptamer can bind specifically to OTA, and thereby the high fluorescence intensity of the dye can be maintained. Under the optimal conditions, the method had a detection limit of 1.3 nM. In addition, the method we proposed is highly sensitive and specific for OTA. Furthermore, the method was proven to be reliable based on its successful application in the detection of OTA in red wine samples. Therefore, this promising, facile, and quencher-free method may be applied to detect other toxins by using other appropriate aptamers.
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11
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Zhu W, Nie Y, Xu Y. The incidence and distribution of ochratoxin A in Daqu, a Chinese traditional fermentation starter. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.02.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Zhu W, Ren C, Nie Y, Xu Y. Quantification of ochratoxin A in Chinese liquors by a new solid-phase extraction clean-up combined with HPLC-FLD method. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.11.044] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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13
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Chen W, Jin Y, Liu A, Wang X, Chen F. Rapid detection of ochratoxin A on membrane by dot immunogold filtration assay. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:610-614. [PMID: 25678129 DOI: 10.1002/jsfa.7130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 01/30/2015] [Accepted: 02/04/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Ochratoxin A (OTA), a widely distributed mycotoxin produced by certain species of Aspergillus and Penicillium, has been identified as a carcinogenic, hepatotoxic, teratogenic, nephrotoxic and immunotoxic toxin. To reduce the risk of OTA contamination, a rapid, inexpensive, suitable and on-site assay for its detection is required. RESULTS In this study a dot immunogold filtration assay (DIGFA) of OTA on high-flow nitrocellulose membrane was developed. Firstly colloidal gold was synthesized and colloidal gold-polyclonal antibody (PcAb) conjugates against OTA were prepared at the optimal colloidal gold-labeled pH value and package amount. Then the colloidal gold-PcAb conjugates were used to develop the OTA DIGFA. The results demonstrated a visual detection limit of approximately 10 ng mL(-1) OTA. In addition, this method had no cross-reaction with zearalenone, aflatoxin B1 or citrinin. CONCLUSION These results indicated that the developed DIGFA could be applied for the actual detection of samples without complicated steps.
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Affiliation(s)
- Weifeng Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Yucui Jin
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Aiping Liu
- College of Food Science, Sichuan Agricultural University, Yaan, 625014, Sichuan, China
| | - Xiaohong Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
| | - Fusheng Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
- State Key Laboratory of Agro-microbiology of China, Huazhong Agricultural University, Wuhan, 430070, Hubei, China
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Luan Y, Chen J, Li C, Xie G, Fu H, Ma Z, Lu A. Highly Sensitive Colorimetric Detection of Ochratoxin A by a Label-Free Aptamer and Gold Nanoparticles. Toxins (Basel) 2015; 7:5377-85. [PMID: 26690477 PMCID: PMC4690133 DOI: 10.3390/toxins7124883] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 11/30/2015] [Accepted: 12/01/2015] [Indexed: 12/23/2022] Open
Abstract
A label-free aptamer-based assay for the highly sensitive and specific detection of Ochratoxin A (OTA) was developed using a cationic polymer and gold nanoparticles (AuNPs). The OTA aptamer was used as a recognition element for the colorimetric detection of OTA based on the aggregation of AuNPs by the cationic polymer. By spectroscopic quantitative analysis, the colorimetric assay could detect OTA down to 0.009 ng/mL with high selectivity in the presence of other interfering toxins. This study offers a new alternative in visual detection methods that is rapid and sensitive for OTA detection.
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Affiliation(s)
- Yunxia Luan
- Agriculture Environment, Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China.
| | - Jiayi Chen
- Agriculture Environment, Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China.
| | - Cheng Li
- Agriculture Environment, Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China.
| | - Gang Xie
- Grain Safety, Academy of State Administration of Grain, Beijing 100037, China.
| | - Hailong Fu
- Agriculture Environment, Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China.
| | - Zhihong Ma
- Agriculture Environment, Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China.
| | - Anxiang Lu
- Agriculture Environment, Beijing Research Center for Agricultural Standards and Testing, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
- Risk Assessment Lab for Agro-products (Beijing), Ministry of Agriculture, Beijing 100097, China.
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Wei Y, Zhang J, Wang X, Duan Y. Amplified fluorescent aptasensor through catalytic recycling for highly sensitive detection of ochratoxin A. Biosens Bioelectron 2014; 65:16-22. [PMID: 25461133 DOI: 10.1016/j.bios.2014.09.100] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 09/01/2014] [Accepted: 09/23/2014] [Indexed: 12/31/2022]
Abstract
This paper describes a novel approach utilizing nano-graphite-aptamer hybrid and DNase I for the amplified detection of ochratoxin A (OTA) for the first time. Nano-graphite can effectively quench the fluorescence of carboxyfluorescein (FAM) labeled OTA specific aptamer due to their strong π-π; stacking interactions; while upon OTA addition, it will bind with aptamer to fold into an OTA-aptamerG-quadruplex structure, which does not adsorb on the surface of nano-graphite and thus retains the dye fluorescence. Meanwhile, the G-quadruplex structure can be cleaved by DNase I, and in such case OTA is delivered from the complex. The released OTA then binds other FAM-labeled aptamers on the nano-graphite surface, and touches off another target recycling, resulting in the successive release of dye-labeled aptamers from the nano-graphite, which leads to significant amplification of the signal. Under the optimized conditions, the present amplified sensing system exhibits high sensitivity toward OTA with a limit of detection of 20nM (practical measurement), which is about 100-fold higher than that of traditional unamplified homogeneous assay. Our developed method also showed high selectivity against other interference molecules and can be applied for the detection of OTA in real red wine samples. The proposed assay is simple, cost-effective, and might open a door for the development of new assays for other biomolecules. This aptasensor is of great practical importance in food safety and could be widely extended to the detection of other toxins by replacing the sequence of the recognition aptamer.
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Affiliation(s)
- Yin Wei
- Research Center of Analytical Instrumentation, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Ji Zhang
- Research Center of Analytical Instrumentation, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Xu Wang
- Research Center of Analytical Instrumentation, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Yixiang Duan
- Research Center of Analytical Instrumentation, College of Life Science, Sichuan University, Chengdu, China.
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Lv Z, Chen A, Liu J, Guan Z, Zhou Y, Xu S, Yang S, Li C. A simple and sensitive approach for ochratoxin A detection using a label-free fluorescent aptasensor. PLoS One 2014; 9:e85968. [PMID: 24465818 PMCID: PMC3897567 DOI: 10.1371/journal.pone.0085968] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 12/09/2013] [Indexed: 11/19/2022] Open
Abstract
Ochratoxin A(OTA) is found to be one of the predominant contaminating mycotoxins in a wide variety of food commodities. To avoid the risk of OTA consumption, the detection and quantitation of OTA level are of great significance. Based on the fact that ssDNA aptamer has the ability to form a double-strand structure with its complementary sequence, a simple and rapid aptamer-based label-free approach for highly sensitive and selective fluorescence detection of OTA was developed by using ultra-sensitive double-strand DNA specific dyes PicoGreen. The results showed that as low as 1 ng/mL of OTA could be detected with a dynamic range of more than 5 orders of magnitude which satisfies the requirements for OTA maximum residue limit in various food regulated by European Commission. With the specificity of aptamer, the assay exhibited high selectivity for OTA against two other analogues (N-acetyl-l-phenylalanine and zearalenone). We also tested the aptasensor practicability using real sample of 1% beer spiked with a series of concentration of OTA and the results show good tolerance to matrix effect. All detections could be achieved in less than 30 min, which provides a simple, quick and sensitive detection method for OTA screening in food safety and could be easily extend to other small molecular chemical compounds detection which aptamer has been selected.
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Affiliation(s)
- Zhenzhen Lv
- College of Food Science, Sichuan Agricultural University, Ya'an, China
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Ailiang Chen
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
- * E-mail: (AC); (CL)
| | - Jinchuan Liu
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Zheng Guan
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Yu Zhou
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Siyuan Xu
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Shuming Yang
- Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, China
- Key Laboratory of Agri-Food Quality and Safety, Ministry of Agriculture, Beijing, China
| | - Cheng Li
- College of Food Science, Sichuan Agricultural University, Ya'an, China
- * E-mail: (AC); (CL)
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Prieto-Simón B, Karube I, Saiki H. Sensitive detection of ochratoxin A in wine and cereals using fluorescence-based immunosensing. Food Chem 2012; 135:1323-9. [DOI: 10.1016/j.foodchem.2012.05.060] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 04/10/2012] [Accepted: 05/11/2012] [Indexed: 10/28/2022]
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Duan N, Wu S, Ma X, Chen X, Huang Y, Wang Z. Gold Nanoparticle-Based Fluorescence Resonance Energy Transfer Aptasensor for Ochratoxin A Detection. ANAL LETT 2012. [DOI: 10.1080/00032719.2011.653899] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Teixeira T, Hoeltz M, Einloft T, Dottori H, Manfroi V, Noll I. Determination of ochratoxin A in wine from the southern region of Brazil by thin layer chromatography with a charge-coupled detector. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 2011; 4:289-93. [DOI: 10.1080/19393210.2011.638088] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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WANG XICHUN, ZHANG HAIBIN, LIU HAIMING, HE CHENGHUA, ZHANG AIHUA, MA JINRONG, MA YANNA, WU WENDA, ZHENG HAO. AN IMMUNOARRAY FOR THE SIMULTANEOUS DETECTION OF TWO MYCOTOXINS, OCHRATOXIN A AND FUMONISIN B1. J Food Saf 2011. [DOI: 10.1111/j.1745-4565.2011.00314.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Wang Z, Duan N, Hun X, Wu S. Electrochemiluminescent aptamer biosensor for the determination of ochratoxin A at a gold-nanoparticles-modified gold electrode using N-(aminobutyl)-N-ethylisoluminol as a luminescent label. Anal Bioanal Chem 2010; 398:2125-32. [PMID: 20835816 DOI: 10.1007/s00216-010-4146-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 08/17/2010] [Accepted: 08/18/2010] [Indexed: 01/22/2023]
Abstract
A highly selective electrochemiluminescent biosensor for the detection of target nephrotoxic toxin, ochratoxin A (OTA), was developed using a DNA aptamer as the recognition element and N-(4-aminobutyl)-N-ethylisoluminol (ABEI) as the signal-producing compound. The electrochemiluminescent aptamer biosensor was fabricated by immobilizing aptamer complementary DNA 1 sequence onto the surface of a gold-nanoparticle (AuNP)-modified gold electrode. ABEI-labeled aptamer DNA 2 sequence hybridized to DNA 1 and was utilized as an electrochemiluminescent probe. A decreased electrochemiluminescence (ECL) signal was generated upon aptamer recognition of the target OTA, which induced the dissociation of DNA 2 (ABEI-labeled aptamer electrochemiluminescent probe) from DNA 1 and moved it far away from the electrode surface. Under the optimal conditions, the decreased ECL intensity was proportional to an OTA concentration ranging from 0.02 to 3.0 ng mL(-1), with a detection limit of 0.007 ng mL(-1). The relative standard deviation was 3.8% at 0.2 ng mL(-1) (n = 7). The proposed method has been applied to measure OTA in naturally contaminated wheat samples and validated by an official method. This work demonstrates the combination of a highly binding aptamer with a highly sensitive ECL technique to design an electrochemiluminescent biosensor, which is a very promising approach for the determination of small-molecule toxins.
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Affiliation(s)
- Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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24
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Urusov AE, Zherdev AV, Dzantiev BB. Immunochemical methods of mycotoxin analysis (review). APPL BIOCHEM MICRO+ 2010. [DOI: 10.1134/s0003683810030038] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Milićević D, Jurić V, Stefanović S, Baltić T, Janković S. Evaluation and validation of two chromatographic methods (HPLC-fluorescence and LC-MS/MS) for the determination and confirmation of ochratoxin A in pig tissues. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2010; 58:1074-1081. [PMID: 20012273 DOI: 10.1007/s00244-009-9436-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 11/23/2009] [Indexed: 05/28/2023]
Abstract
Two different analytical methods for the determination and confirmation of ochratoxin A (OTA) in blood serum, kidney, and liver of pigs have been compared. Sample cleanup was based on liquid-liquid phase extraction. The detection of OTA was accomplished with high-performance liquid chromatography (HPLC) combined either with fluorescence detection (FLD) or electrospray ionization (ESI+) tandem mass spectrometry (MS/MS). The comparative method of evaluation was based on the investigation of 90 samples of blood serum, kidney, and liver per animal originating from different regions of Serbia. The analytical results are discussed in view of the respective method validation data and the corresponding experimental protocols. In general, analytical data obtained with liquid chromatography (LC)-MS/MS detection offered comparable good results in the sub-ppb concentration level indicating that the electrospray tandem mass spectrometric (LC-MS/MS) method was more selective and sensitive for the analysis and confirmation of OTA in pig tissues than the HPLC method after the methylation of OTA.
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Affiliation(s)
- Dragan Milićević
- Institute of Meat Hygiene and Technology, Kaćanskog 13, 11000 Belgrade, Serbia.
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26
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Bhat R, Rai RV, Karim A. Mycotoxins in Food and Feed: Present Status and Future Concerns. Compr Rev Food Sci Food Saf 2010; 9:57-81. [DOI: 10.1111/j.1541-4337.2009.00094.x] [Citation(s) in RCA: 372] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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27
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Immunoaffinity column clean-up techniques in food analysis: A review. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:115-32. [DOI: 10.1016/j.jchromb.2009.05.042] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2009] [Revised: 05/16/2009] [Accepted: 05/19/2009] [Indexed: 11/15/2022]
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28
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Meca G, Ritieni A. Production and analysis of ochratoxin A produced by Aspergillus ochraceus ITEM 5137 in submerged culture. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.04.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Milićević DR, Jurić VB, Stefanović SM, Vesković-Moracanin SM, Janković SD. Evaluation and validation of two different chromatographic methods (HPLC and LC-MS/MS) for the determination and confirmation of ochratoxin A in pig tissues. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2009; 44:781-787. [PMID: 20183090 DOI: 10.1080/03601230903238327] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This study was undertaken to compare two different analytical methods for the determination and confirmation of ochratoxin A (OTA) in blood serum, kidney and liver of pigs. Sample clean-up was based on liquid-liquid phase extraction. The detection of OTA was accomplished with high-performance liquid chromatography (HPLC) combined either with fluorescence detection (FL) or electro spray ionization (ESI+) tandem mass spectrometry (MS-MS). Comparative method evaluation was based on the investigation of 90 samples of blood serum, kidney and liver per animal originating from different regions of Serbia. The analytical results are discussed in view of the respective method validation data and the corresponding experimental protocols. In general, analytical data obtained with (LC-MS-MS) liquid chromatography electro spray tandem mass spectro metry detection offered comparable good results at the sub-ppb concentration level. The results indicate that the liquid chromatography electro spray tandem mass spectrometric (LC-MS/MS) method was more specific and sensitive for the analysis and confirmation of ochratoxin A in pig tissues then high pressure liquid chromatography (HPLC) method after methylation of OTA.
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Goryacheva IY, Rusanova TY, Burmistrova NA, De Saeger S. Immunochemical methods for the determination of mycotoxins. JOURNAL OF ANALYTICAL CHEMISTRY 2009. [DOI: 10.1134/s1061934809080024] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Noba S, Uyama A, Mochizuki N. Determination of ochratoxin a in ready-to-drink coffee by immunoaffinity cleanup and liquid chromatography-tandem mass spectrometry. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2009; 57:6036-6040. [PMID: 19537783 DOI: 10.1021/jf900546p] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We developed a simple and accurate method for determining ochratoxin A (OTA) in ready-to-drink coffee, using an immunoaffinity column for cleanup and liquid chromatography-tandem mass spectrometry (LC/MS/MS) for identification and quantification. When uniformly stable isotope-labeled OTA (U-[(13)C(20)]-OTA) was employed as an internal standard, the recovery rate of the method was 97.3% (the spiked OTA level was 0.10 ng/mL), the repeatability (relative standard deviation) was 1.9%, and the intermediate precision (relative standard deviation) was 4.0%. The limit of quantification was 0.0065 ng/mL based on a signal-to-noise ratio in coffee of 10:1. The developed method was used for the determination of OTA in ready-to-drink coffee. A total of 30 ready-to-drink coffee samples commercially available in Japan were analyzed. OTA was detected in all of the samples at concentrations ranging from trace levels (0.0020-0.010 ng/mL) to 0.037 ng/mL. This method was shown to be useful for accurately evaluating the intake of OTA from coffee beverages.
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Affiliation(s)
- Shigekuni Noba
- Research Laboratories for Food Safety Chemistry, Asahi Breweries, Limited, Moriya-shi, Ibaraki 302-0106, Japan.
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32
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Analysis of ochratoxin A in pig tissues using high pressure liquid chromatography (HPLC) and liquid chromatography tandem mass spectrometry (LC/MS/MS) as confirmative methods. ZBORNIK MATICE SRPSKE ZA PRIRODNE NAUKE 2009. [DOI: 10.2298/zmspn0917051m] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Two different analytical methods for the determination and confirmation of ochratoxin A (OTA) in blood serum, kidney and liver of pigs have been compared. Sample clean-up was based on liquid-liquid phase extraction. The detection of OTA was accomplished with high-performance liquid chromatography (HPLC) combined either with fluorescence detection (FL) or electro spray ionization (ESI+) tandem mass spectrometry (MS-MS). Comparative method evaluation was based on the investigation of 82 samples of blood serum, kidney and liver originating from different regions of Serbia. The analytical results are discussed in view of the respective method validation data and the corresponding experimental protocols. In general, analytical data obtained with LC-MS-MS detection offered comparably good results in the sub-ppb concentration level indicating that the liquid chromatography electro spray tandem mass spectrometric (LC-MS/MS) method was more specific and sensitive for the analysis and confirmation of ochratoxin A in pig tissues than high pressure liquid chromatography (HPLC) method after methylation of OTA.
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33
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Ngundi MM, Shriver-Lake LC, Moore MH, Lassman ME, Ligler FS, Taitt CR. Array biosensor for detection of ochratoxin A in cereals and beverages. Anal Chem 2007; 77:148-54. [PMID: 15623290 DOI: 10.1021/ac048957y] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Contamination of food by mycotoxins occurs in minute quantities, and therefore, there is a need for a highly sensitive and selective device that can detect and quantify these organic toxins. We report the development of a rapid and highly sensitive array biosensor for the detection and quantitation of ochratoxin A (OTA). The array biosensor utilizes a competitive immunoassay format. Immobilized OTA derivatives compete with toxin in solution for binding to fluorescent anti-OTA antibody spiked into the sample. This competition is quantified by measuring the formation of the fluorescent immunocomplex on the waveguide surface. The fluorescent signal is inversely proportional to the concentration of OTA in the sample. Analyses for OTA in buffer and a variety of food and beverage samples were performed. Samples were extracted with methanol, without any sample cleanup or preconcentration step prior to analysis. The limit of detection for OTA in several cereals ranged from 3.8 to 100 ng/g, while in coffee and wine, detection limits were 7 and 38 ng/g, respectively.
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Affiliation(s)
- Miriam M Ngundi
- Center of Bio/Molecular Science & Engineering, Naval Research Laboratory, Washington, D.C. 20375, USA
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34
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Goryacheva IY, De Saeger S, Lobeau M, Eremin SA, Barna-Vetró I, Van Peteghem C. Approach for ochratoxin A fast screening in spices using clean-up tandem immunoassay columns with confirmation by high performance liquid chromatography–tandem mass spectrometry (HPLC–MS/MS). Anal Chim Acta 2006; 577:38-45. [PMID: 17723651 DOI: 10.1016/j.aca.2006.06.033] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2006] [Revised: 05/24/2006] [Accepted: 06/02/2006] [Indexed: 11/28/2022]
Abstract
An approach for ochratoxin A (OTA) fast cost-effective screening based on clean-up tandem immunoassay columns was developed and optimized for OTA detection with a cut-off level of 10 microg kg(-1) in spices. Two procedures were tested and applied for OTA detection. Column with bottom detection immunolayer was optimized for OTA determination in Capsicum ssp. spices. A modified clean-up tandem immunoassay procedure with top detection immunolayer was successfully applied for all tested spices. Its main advantages were decreasing of the number of analysis steps and quantity of antibody and also minimizing of matrix effects. The total duration of the extraction and analysis was about 40 min for six samples. Chilli, red pepper, pili-pili, cayenne, paprika, nutmeg, ginger, white pepper and black pepper samples were analyzed for OTA contamination by the proposed clean-up tandem immunoassay procedures. Clean-up tandem immunoassay results were confirmed by HPLC-MS/MS with immunoaffinity column clean-up. Among 17 tested Capsicum ssp. spices, 6 samples (35%) contained OTA in a concentration exceeding the 10 microg kg(-1) limit discussed by the European Commission. All tested nutmeg (n=8), ginger (n=5), white pepper (n=7) and black pepper (n=6) samples did not contain OTA above this action level.
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Affiliation(s)
- I Yu Goryacheva
- Ghent University, Faculty of Pharmaceutical Sciences, Laboratory of Food Analysis, Harelbekestraat 72, 9000 Ghent, Belgium.
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Ventura M, Anaya I, Broto-Puig F, Agut M, Comellas L. Two-dimensional thin-layer chromatographic method for the analysis of ochratoxin A in green coffee. J Food Prot 2005; 68:1920-2. [PMID: 16161695 DOI: 10.4315/0362-028x-68.9.1920] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A low-cost thin-layer chromatographic method has been developed for the presumptive measurement of ochratoxin A (OTA) at 5 microg/kg in green coffee beans. The analytical method consisted of extracting OTA by shaking the beans with a mixture of methanol and aqueous sodium bicarbonate solution, which was then purified by liquid-liquid partition into toluene. OTA was separated by normal-phase two-dimensional thin-layer chromatography and detected by visual estimation of fluorescence intensity under a UV lamp at 365 nm. The chromatography solvents were toluene-methanol-formic acid (8:2:0.03) for the first development and petroleum ether-ethyl acetate-formic acid (8:10:1) for the second dimension development. This method was tested with uncontaminated green coffee bean samples spiked with an OTA standard at four different concentrations (5, 10, 20, and 30 microg/kg). The method is rapid, simple, and very easy to implement in coffee-producing countries. It is highly selective and does not involve the use of chlorinated solvents in the sample extraction step. This inexpensive method has been applied to different types of green coffee samples from various countries (Zimbabwe, Brazil, India, Uganda, Colombia, and Indonesia) and different manufacturers, and no OTA below the detection limit of 5 microg/kg was detected in any samples analyzed.
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Affiliation(s)
- Meritxell Ventura
- Analytical Chemistry Department, Institut Química de Sarrià (Ramon Llull University), Via Augusta 390, 08017 Barcelona, Spain.
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Yu FY, Chi TF, Liu BH, Su CC. Development of a sensitive enzyme-linked immunosorbent assay for the determination of ochratoxin A. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2005; 53:6947-53. [PMID: 16104825 DOI: 10.1021/jf0513922] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Polyclonal antibodies for ochratoxin A (OTA) were generated from rabbits after the animals had been immunized with either OTA-gamma-globulin or OTA- keyhole limpet hemocyanin (KLH). A competitive direct enzyme-linked immunosorbent assay (cdELISA) and a competitive indirect ELISA (ciELISA) were used for the characterization of the antibodies and for analysis of OTA in various agricultural commodities. The antibody titers in the serum of rabbits immunized with OTA-gamma-globulin were considerably higher than those in rabbits immunized with OTA-KLH. The antibodies from the rabbits immunized with OTA-gamma-globulin were further characterized. In the cdELISA, the concentrations causing 50% inhibition (IC(50)) of binding of OTA-horseradish peroxidase to the antibodies by OTA, ochratoxin B (OTB), and ochratoxin C (OTC) were found to be 0.90, 110, and 0.54 ng/mL, respectively. When 10 to 250 ng/g of standard OTA was spiked to soybean samples and then extracted with 50% aqueous methanol, the recovery rate of OTA was found to be 85.9% in the cdELISA. Analysis of OTA in various agricultural commodities showed that 12 of the 20 examined samples were contaminated with OTA at levels from 16 to 160 ng/g. The efficacy of cdELISA was also confirmed by the high-performance liquid chromatography method.
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Affiliation(s)
- Feng-Yih Yu
- Department of Life Sciences, Chung Shan Medical University, Number 110, Section 1, Chien Kuo North Road, Taichung, Taiwan.
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Sarter S, Zakhia N. Chemiluminescent and bioluminescent assays as innovative prospects for mycotoxin determination in food and feed. LUMINESCENCE 2005; 19:345-51. [PMID: 15558672 DOI: 10.1002/bio.791] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Mycotoxin contamination of food and feedstuffs is among the top priorities for human and animal safety. The currently used techniques for mycotoxin determination, either chromatography or ELISA, are unsuitable for routine in-field assessment. There is an urgent need for other accurate, simple and cost-effective techniques that can be used as a screening tool for a rapid estimation of mycotoxin contamination in commodity lots. This paper reviews the literature on the use of chemiluminescence (CL) and bioluminescence (BL) assays for direct or indirect mycotoxin assessment. The chemiluminescence immunoassays, adenosine triphosphate (ATP) bioluminescence and bioassays are reviewed and their advantages and limitations discussed. These techniques used in food testing and the pharmaceutical industry offer promise as rapid techniques for mycotoxin determination. Chemiluminescence and bioluminescence bioassays are the most innovative alternatives to the conventional techniques used for mycotoxin determination in food and feed.
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Affiliation(s)
- Samira Sarter
- CIRAD, TA40/16, 73 Rue JF Breton, 34398 Montpellier Cedex 5, France.
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O'callaghan J, Dobson ADW. Molecular Characterization of Ochratoxin A Biosynthesis and Producing Fungi. ADVANCES IN APPLIED MICROBIOLOGY 2005; 58C:227-243. [PMID: 16543035 DOI: 10.1016/s0065-2164(05)58007-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- J O'callaghan
- Microbiology Department, University College Cork, National University of Ireland, Cork, Ireland
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Garcia-Villanova RJ, Cordón C, González Paramás AM, Aparicio P, Garcia Rosales ME. Simultaneous immunoaffinity column cleanup and HPLC analysis of aflatoxins and ochratoxin A in Spanish bee pollen. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2004; 52:7235-7239. [PMID: 15563200 DOI: 10.1021/jf048882z] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bee pollen is a major substrate for mycotoxins growth when no prompt and adequate drying is performed by the beekeeper after collection by bees. Regulatory limits for aflatoxins and ochratoxin A are currently in force in the European Union for a rising list of foodstuffs, but not for this. An immunoaffinity column cleanup process has been applied prior to the analysis of aflatoxins B(1), B(2), G(1), and G(2) and ochratoxin A (OTA). Optimization of the HPLC conditions has involved both a gradient elution and a wavelength program for the separation and fluorimetric quantitation of all five mycotoxins at their maximum excitation and emission values of wavelength in a single run. The higher limit of detection (mug/kg) was 0.49 for OTA and 0.20 for aflatoxin B(1). Repeatability (RSDr) at the lower limit tested ranged from 9.85% for OTA to 6.23% for aflatoxin G(2), and recoveries also at the lower spiked level were 73% for OTA and 81% for aflatoxin B(1). None of the 20 samples assayed showed quantifiable values for the five mycotoxins.
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Affiliation(s)
- Rafael J Garcia-Villanova
- Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Farmacia, Universidad de Salamanca, Campus Miguel de Unamuno, E-37007 Salamanca, Spain.
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Shim WB, Kolosova AY, Kim YJ, Yang ZY, Park SJ, Eremin SA, Lee IS, Chung DH. Fluorescence polarization immunoassay based on a monoclonal antibody for the detection of ochratoxin A. Int J Food Sci Technol 2004. [DOI: 10.1111/j.1365-2621.2004.00856.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Grosso F, Fremy JM, Bevis S, Dragacci S. Joint IDF-IUPAC-IAEA(FAO) interlaboratory validation for determining aflatoxin M1 in milk by using immunoaffinity clean-up before thin-layer chromatography. ACTA ACUST UNITED AC 2004; 21:348-57. [PMID: 15204559 DOI: 10.1080/02652030410001662048] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A collaborative study was conducted under the auspices of the International Dairy Federation (IDF), the International Union of Pure and Applied Chemistry (IUPAC) and the International Atomic Energy Agency (IAEA), a collaborative Food and Agricultural Organization (FAO) body fully to validate a method combining immunoaffinity clean-up to thin-layer chromatography for the determination of aflatoxin M(1) in milk. Work was done in order to afford those laboratories not equipped with high-performance liquid chromatography, mainly from developing countries, with a simplified but fully validated method as an alternative to the European validated immunoaffinity-high performance liquid chromatography method published as an EN ISO Standard 14501, February 1999. The validation study was carried out on samples of aflatoxin M(1)-contaminated milk and milk powder at levels close to the tolerable level of 0.5 microg l(-1) as recommended by the Codex Alimentarius and to the regulatory level of 0.05 microg l(-1) as laid down by the European Commission. Fourteen laboratories representing 11 countries participated in the trial. The relative standard deviations for repeatability and reproducibility based on raw data were in the range 27-48 and 35-54%, respectively. The recovery rate varied from 32 to 120%. The mishandling of two crucial steps of the protocol such as matrix sample reconstitution and extract evaporation could explain the wide variation of the recovery rate. For this reason, data were then corrected for recovery. Consequently, the relative standard deviations for repeatability and reproducibility were recalculated after correction for recovery and were in the range 26-54 and 34-53%, respectively. The method will be published as a standard ISO/DIS 14674--IDF 190.
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Affiliation(s)
- F Grosso
- Agence Français de Sécurité Sanitaire des Aliments, Microbial Toxins Unit, Maisons-Alfort, France.
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Blesa J, Berrada H, Soriano J, Moltó J, Mañes J. Rapid determination of ochratoxin A in cereals and cereal products by liquid chromatography. J Chromatogr A 2004. [DOI: 10.1016/j.chroma.2004.06.086] [Citation(s) in RCA: 5] [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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Affiliation(s)
- Joseph Sherma
- Department of Chemistry, Lafayette College, Easton, Pennsylvania 18042, USA
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Method validation for the determination of ochratoxin A in green and soluble coffee by immunoaffinity column cleanup and liquid chromatography. Mycotoxin Res 2004; 20:59-67. [DOI: 10.1007/bf02946736] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2005] [Accepted: 02/24/2005] [Indexed: 10/21/2022]
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Gilbert J, Anklam E. Validation of analytical methods for determining mycotoxins in foodstuffs. Trends Analyt Chem 2002. [DOI: 10.1016/s0165-9936(02)00604-0] [Citation(s) in RCA: 171] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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