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EnglishFumonisins B (FBs) can occur in maize as free forms and as hidden FBs (interaction between FBs and matrix macro-constituents). The analytical methods to detect free FBs in maize and derived products usually involve extraction with aqueous methanol and/or acetonitrile; for hidden FBs, alkaline hydrolysis (2MKOH) and following CH3CN extraction is used. Recently, we proposed a simple phosphate buffer (PB) extraction to detect free FBs in masa and maize samples. This study aimed at evaluating if this method is suitable to detect also hidden FBs; then, a comparison between the most common solvents, PB, and alkaline hydrolysis was carried out. For maize samples, the results showed that 0.4 M PB can extract both free and most hidden FBs; however, this method was not suitable for some categories of maize-based processed food products, in particular cornflakes, chips, and crispbreads. To solve this drawback, a modified PB extraction, which entails the addition of Carrez solutions in order to precipitate proteins, was tested and satisfactory results were obtained. Finally, the alkaline hydrolysis of maize-based food extracts showed that bound FBs can be co-extracted together with free forms by 0.4 M PB and quantified as hydrolyzed FBs.
| Autori: | |
| Titolo: | Hidden Fumonisins: Simple and Innovative Extractions for Their Determination in Maize and Derived Products |
| Digital Object Identifier (DOI): | http://dx.doi.org/DOI 10.1007/s12161-015-0377-2 |
| Data di pubblicazione: | 2016 |
| Abstract: | Fumonisins B (FBs) can occur in maize as free forms and as hidden FBs (interaction between FBs and matrix macro-constituents). The analytical methods to detect free FBs in maize and derived products usually involve extraction with aqueous methanol and/or acetonitrile; for hidden FBs, alkaline hydrolysis (2MKOH) and following CH3CN extraction is used. Recently, we proposed a simple phosphate buffer (PB) extraction to detect free FBs in masa and maize samples. This study aimed at evaluating if this method is suitable to detect also hidden FBs; then, a comparison between the most common solvents, PB, and alkaline hydrolysis was carried out. For maize samples, the results showed that 0.4 M PB can extract both free and most hidden FBs; however, this method was not suitable for some categories of maize-based processed food products, in particular cornflakes, chips, and crispbreads. To solve this drawback, a modified PB extraction, which entails the addition of Carrez solutions in order to precipitate proteins, was tested and satisfactory results were obtained. Finally, the alkaline hydrolysis of maize-based food extracts showed that bound FBs can be co-extracted together with free forms by 0.4 M PB and quantified as hydrolyzed FBs. |
| Lingua: | Inglese |
| Rivista: | |
| Citazione: | Bertuzzi, T., Mulazzi, A., Rastelli, S., Pietri, A., Hidden Fumonisins: Simple and Innovative Extractions for Their Determination in Maize and Derived Products, <<FOOD ANALYTICAL METHODS>>, 2016; 2016 (N/A): N/A-N/A. [doi:DOI 10.1007/s12161-015-0377-2] [http://hdl.handle.net/10807/78145] |
| Appare nelle tipologie: | Articolo in rivista, Nota a sentenza |
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