Stability of the Fusarium mycotoxins nivalenol, deoxynivalenol and zearalenone in ground maize under typical cooking environments
Stability of the Fusarium mycotoxins nivalenol, deoxynivalenol and zearalenone in ground maize under typical cooking environments
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DOI：
10.1080/02652030110052283
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发表时间：
2001-11-01
期刊：
影响因子：
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通讯作者：
Smith, WA
中科院分区：
文献类型：
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作者：
Lauren, DR;Smith, WA
研究了水分、pH和热量对玉米土壤中天然污染物雪腐镰刀菌烯醇（NIV）、脱氧雪腐镰刀菌烯醇（DON）和玉米赤霉烯酮（ZEN）稳定性的影响。标准溶液试验还测定了pH、盐和温度对NIV和DON的影响。溶液试验表明，NIV和DON在pH范围1-10的缓冲溶液中相对稳定。需要相当恶劣的条件（pH值12，高盐浓度，80度，长时间暴露）才能产生实质性的分解。在玉米基质中，这些毒素相对于溶液试验进一步稳定。在玉米干重的10%、20%或50%的浓度下用碳酸氢盐溶液处理，然后在80度或110度的温度下加热2天和12天，NIV和DON都降低了（60-100%）。在较低的测试温度下（20,40℃）没有可测量的减少。NIV（但不是DON）在加水并在80或110度加热12天后也显示出一些减少。用碳酸氢钠溶液处理后，即使在110度下加热12天，ZEN的含量也没有减少。
The effects of moisture, pH and heat on the stability of nivalenol (NIV), deoxynivalenol (DON) and zearalenone (ZEN) present as natural contaminants of ground maize were measured for different periods. Standard solution tests were also performed to measure pH, salt and temperature effects on NIV and DON. The solution tests showed NIV and DON to be relatively stable in buffer solutions over the pH range 1-10. Quite harsh conditions (pH 12, high salt concentration, 80 degreesC, prolonged exposure) were needed to give substantial breakdown. In the ground maize substrate, these toxins were further stabilized relative to the solution tests. NIV and DON were both reduced (range 60-100%) by treatment with aqueous bicarbonate solution at 10, 20 or 50% of the ground maize dry weight, and subsequent heating at 80 or 110 degreesC for 2 and 12 days. There was no measurable reduction at lower test temperatures (20, 40 degreesC). NIV (but not DON) also showed some reduction following addition of water and heating at 80 or 110 degreesC for 12 days. ZEN content was not reduced even by 12 days of heating at 110 degreesC after treatment with a sodium bicarbonate solution.