玉米赤霉烯酮
赭曲霉毒素A
渣
黄曲霉毒素
化学
吸附
真菌毒素
赭曲霉毒素
色谱法
食品科学
有机化学
作者
Jean‐Michel Fernandes,Thalita Calado,Ana Guimarães,M.A.M. Rodrigues,Luı́s Abrunhosa
标识
DOI:10.1007/s12550-019-00349-9
摘要
This work characterizes the adsorption of aflatoxin B1 (AFB1), ochratoxin A (OTA), and zearalenone (ZEN) by dry micronized olive pomace (OliPom) and grape stems (GrapStem). Their performance was compared with that of three other materials, activated carbon (ActCarb), bentonite (Bent), and a commercial product (ComProd). Experiments were conducted in vitro at several pH values using buffer solutions. For OTA and ZEA, the strongest adsorbent was ActCarb, with 5 mg/mL being sufficient to bind > 99% of all the mycotoxins. For AFB1, ComProd and Bent were the most effective adsorbents, as 0.5 mg/mL bound > 95% of this mycotoxin. Among the two agro by-products, GrapStem was the strongest binder, with 10 mg/mL being sufficient to bind at least 90% of all the mycotoxins (except OTA at pH 7). OliPom was the least efficient material, but at a concentration of 30 mg/mL, its performance was similar to GrapStem. Adsorption isotherms were calculated, and ActCarb showed the maximum adsorption capacity (Qmax), with values that ranged from 19 to 24 μg/mg for pH 2 and from 17 to 20 μg/mg for pH 7. ComProd, Bent, and GrapStem showed more similar Qmax between them (1.4–4.4 μg/mg for pH 2 and 0.5–4.8 μg/mg for pH 7).
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