Yumbe-Guevara B E, Imoto T, Yoshizawa T
Faculty of Agriculture, Kagawa University, Miki, Kagawa, Japan.
Food Addit Contam. 2003 Dec;20(12):1132-40. doi: 10.1080/02652030310001620432.
The influence of heating temperature and time on deoxynivalenol (DON), nivalenol (NIV) and zearalenone (ZEA) contents in naturally co-contaminated barley and wheat was investigated intending to establish the basis for a decontamination model of Fusarium mycotoxins in cereals. The standard toxins and whole barley powder samples were heated in a convection oven at 140, 160, 180, 200, or 220 degrees C, and kernel subsamples (200 g each) were roasted in an experimental rotary gas-fired roaster at 150, 180 or 220 degrees C. All treatments resulted in a time-temperature-dependent decomposition of the toxins; the logarithm of the toxin remaining % presented a linear relationship with heating time. The lines equations were used to estimate the half (H) and decimal (D) decomposition times (time required to destroy 50 or 90% of the toxin, respectively). DON and NIV H and D decomposition times were similar and 50% shorter for heated standards than for whole barley powder. ZEA standard values were considerably longer, while whole barley powder values were comparable with those of DON and NIV. At 220 degrees C, D decomposition times of DON, NIV and ZEA heated standards were 11, 10 and 85 min, respectively, while the values obtained in whole barley powder were the same for the three toxins (25 min). The determination of H and D decomposition values constitutes a basis to understand the heating stability nature of each toxin.
研究了加热温度和时间对天然共污染大麦和小麦中脱氧雪腐镰刀菌烯醇（DON）、雪腐镰刀菌烯醇（NIV）和玉米赤霉烯酮（ZEA）含量的影响，旨在建立谷物中镰刀菌毒素去污模型的基础。将标准毒素和全大麦粉样品在对流烘箱中于140、160、180、200或220℃加热，并将谷粒子样品（每个200克）在实验旋转燃气烘焙机中于150、180或220℃烘焙。所有处理均导致毒素随时间-温度的分解；剩余毒素百分比的对数与加热时间呈线性关系。使用线性方程估计半衰期（H）和十分之一衰期（D）分解时间（分别为破坏50%或90%毒素所需的时间）。DON和NIV的H和D分解时间相似，加热标准品的分解时间比全大麦粉短50%。ZEA标准值长得多，而全大麦粉的值与DON和NIV的值相当。在220℃时，加热标准品的DON、NIV和ZEA的D分解时间分别为11、10和85分钟，而在全大麦粉中获得的三种毒素的值相同（25分钟）。H和D分解值的测定构成了了解每种毒素加热稳定性性质的基础。
