Abstract Ochratoxin A (OTA) is a possible human carcinogen with its potent nephrotoxicity and has been found in many agricultural commodities particularly in oats and its processed foods including oat-based infant cereals. While OTA is stable under most thermal processing conditions, alkaline pH can increase the reduction of OTA. In this study, the effect of direct steam injection (DSI) process along with the absence and presence baking soda (0.5% and 1% of solid contents) on the reduction of OTA in oat-based infant cereals was investigated. Food-grade oat flour was spiked with OTA (100 μg/kg) and equilibrated overnight followed by preparation of slurry by adding water to reach 5% solid content. Then the slurry was processed by DSI at 85 °C and 121 °C followed by spray drying at 210 °C. Greater reduction of OTA in DSI processed oat-based infant cereals was observed at higher process temperature to result in 20–28% reduction. In addition, the reduction of OTA increased with increasing amounts of baking soda. These results suggest that OTA may be reduced significantly by DSI process, which can be applied to commercial production of oat-based infant cereals. Baking soda may also help to reduce OTA amount in cereal-based infant cereals during thermal processing.

中文翻译：

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小苏打直接蒸汽注射燕麦基婴儿谷物中赭曲霉毒素 A 的降低

摘要赭曲霉毒素 A (OTA) 是一种可能的人类致癌物，具有很强的肾毒性，已在许多农产品中发现，特别是燕麦及其加工食品，包括以燕麦为基础的婴儿谷物。虽然 OTA 在大多数热处理条件下是稳定的，但碱性 pH 值会增加 OTA 的还原。在这项研究中，研究了直接蒸汽喷射 (DSI) 工艺以及小苏打（固体含量的 0.5% 和 1%）的存在和不存在对减少燕麦基婴儿谷物中 OTA 的影响。食品级燕麦粉加入 OTA (100 μg/kg) 并平衡过夜，然后通过加水制备浆液以达到 5% 的固体含量。然后将浆料在 85°C 和 121°C 下通过 DSI 处理，然后在 210°C 下喷雾干燥。在较高的加工温度下观察到 DSI 加工过的基于燕麦的婴儿谷物中 OTA 的减少更多，从而导致 20-28% 的减少。此外，OTA 的减少随着小苏打量的增加而增加。这些结果表明，DSI 工艺可显着降低 OTA，可应用于燕麦基婴儿谷物的商业生产。小苏打还可能有助于在热处理过程中减少基于谷物的婴儿谷物中的 OTA 量。