Christina Rehagel, Ronald Maul, Kim Lara Gützkow, Ömer Akineden
{"title":"酶免疫法检测植物性牛奶替代品中的真菌毒素:缺陷和局限性。","authors":"Christina Rehagel, Ronald Maul, Kim Lara Gützkow, Ömer Akineden","doi":"10.1007/s12550-022-00467-x","DOIUrl":null,"url":null,"abstract":"<p><p>Plant-based milk alternatives (PBMAs) are a potential source of mycotoxin uptake. To ensure food safety, simple and rapid testing methods of PBMAs for mycotoxins are therefore required. This study investigated the applicability of enzyme immunoassay (EIA) methods for direct testing of PBMAs without sample extraction. Mycotoxin analyses included aflatoxin B<sub>1</sub> (AFB<sub>1</sub>), sterigmatocystin (STC), ochratoxin A (OTA), deoxynivalenol (DON), and T-2/HT-2-toxin (T-2/HT-2). It was found that the PBMA matrix negatively affected the EIA to varying degrees, thus affecting the reliability of the results. A dilution of PBMAs of at least 1:8 was necessary to overcome matrix interference. This resulted in calculated detection limits of 0.4 µg/L (AFB<sub>1</sub>), 2 µg/L (STC), 0.08 µg/L (OTA), 16 µg/L (DON), and 0.4 µg/L (T-2/HT-2). After analysis of 54 PBMA products from German retail stores, positive results in at least one test system were obtained for 23 samples. However, most positive results were near the calculated detection limit. Control analyses of selected samples by LC-MS/MS for AFB<sub>1</sub>, STC, and OTA qualitatively confirmed the presence of trace amounts of STC in some samples, but quantitative agreement was poor. It was concluded that the high diversity of ingredients used in PBMAs led to a highly variable degree of sample matrix interference even in a 1:8 dilution. Since the use of higher dilutions conflicts with the need to achieve low detection limits, the application of EIA for routine mycotoxin analysis in PBMA for mycotoxins requires further study on the development of a feasible sample preparation method.</p>","PeriodicalId":19060,"journal":{"name":"Mycotoxin Research","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9587108/pdf/","citationCount":"2","resultStr":"{\"title\":\"Enzyme immunoassays for the detection of mycotoxins in plant-based milk alternatives: pitfalls and limitations.\",\"authors\":\"Christina Rehagel, Ronald Maul, Kim Lara Gützkow, Ömer Akineden\",\"doi\":\"10.1007/s12550-022-00467-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Plant-based milk alternatives (PBMAs) are a potential source of mycotoxin uptake. To ensure food safety, simple and rapid testing methods of PBMAs for mycotoxins are therefore required. This study investigated the applicability of enzyme immunoassay (EIA) methods for direct testing of PBMAs without sample extraction. Mycotoxin analyses included aflatoxin B<sub>1</sub> (AFB<sub>1</sub>), sterigmatocystin (STC), ochratoxin A (OTA), deoxynivalenol (DON), and T-2/HT-2-toxin (T-2/HT-2). It was found that the PBMA matrix negatively affected the EIA to varying degrees, thus affecting the reliability of the results. A dilution of PBMAs of at least 1:8 was necessary to overcome matrix interference. This resulted in calculated detection limits of 0.4 µg/L (AFB<sub>1</sub>), 2 µg/L (STC), 0.08 µg/L (OTA), 16 µg/L (DON), and 0.4 µg/L (T-2/HT-2). After analysis of 54 PBMA products from German retail stores, positive results in at least one test system were obtained for 23 samples. However, most positive results were near the calculated detection limit. Control analyses of selected samples by LC-MS/MS for AFB<sub>1</sub>, STC, and OTA qualitatively confirmed the presence of trace amounts of STC in some samples, but quantitative agreement was poor. It was concluded that the high diversity of ingredients used in PBMAs led to a highly variable degree of sample matrix interference even in a 1:8 dilution. 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Enzyme immunoassays for the detection of mycotoxins in plant-based milk alternatives: pitfalls and limitations.
Plant-based milk alternatives (PBMAs) are a potential source of mycotoxin uptake. To ensure food safety, simple and rapid testing methods of PBMAs for mycotoxins are therefore required. This study investigated the applicability of enzyme immunoassay (EIA) methods for direct testing of PBMAs without sample extraction. Mycotoxin analyses included aflatoxin B1 (AFB1), sterigmatocystin (STC), ochratoxin A (OTA), deoxynivalenol (DON), and T-2/HT-2-toxin (T-2/HT-2). It was found that the PBMA matrix negatively affected the EIA to varying degrees, thus affecting the reliability of the results. A dilution of PBMAs of at least 1:8 was necessary to overcome matrix interference. This resulted in calculated detection limits of 0.4 µg/L (AFB1), 2 µg/L (STC), 0.08 µg/L (OTA), 16 µg/L (DON), and 0.4 µg/L (T-2/HT-2). After analysis of 54 PBMA products from German retail stores, positive results in at least one test system were obtained for 23 samples. However, most positive results were near the calculated detection limit. Control analyses of selected samples by LC-MS/MS for AFB1, STC, and OTA qualitatively confirmed the presence of trace amounts of STC in some samples, but quantitative agreement was poor. It was concluded that the high diversity of ingredients used in PBMAs led to a highly variable degree of sample matrix interference even in a 1:8 dilution. Since the use of higher dilutions conflicts with the need to achieve low detection limits, the application of EIA for routine mycotoxin analysis in PBMA for mycotoxins requires further study on the development of a feasible sample preparation method.
期刊介绍:
Mycotoxin Research, the official publication of the Society for Mycotoxin Research, is a peer-reviewed, scientific journal dealing with all aspects related to toxic fungal metabolites. The journal publishes original research articles and reviews in all areas dealing with mycotoxins. As an interdisciplinary platform, Mycotoxin Research welcomes submission of scientific contributions in the following research fields:
- Ecology and genetics of mycotoxin formation
- Mode of action of mycotoxins, metabolism and toxicology
- Agricultural production and mycotoxins
- Human and animal health aspects, including exposure studies and risk assessment
- Food and feed safety, including occurrence, prevention, regulatory aspects, and control of mycotoxins
- Environmental safety and technology-related aspects of mycotoxins
- Chemistry, synthesis and analysis.