Abstract The essential trace mineral, selenium (Se), is of fundamental importance to human health. Tartary buckwheat is a pseudocereal variety rich in functional flavonoids. To investigate the characters of Se-enriched Tartary buckwheat in Shaanxi province, we studied effect of different processing methods on its nutrients and selenium distribution in Se-enriched buckwheat groat (Se-BG), milled flour (Se-BMF), extruded flake (Se-BEF) and roasted groat (Se-BRG). The highest total selenium content in Se-BG was 118.04 μg/kg. Se-BMF (110.55 μg/kg) and Se-BEF (98.55 μg/kg) showed less selenium loss while the most selenium loss was recorded in Se-BRG (66.63 μg/kg). Selenium and selenomethionine (SeMet) were mainly present in glutelin, followed by albumin. SeMet content followed the trends of Se-BG (76.21 μg/kg groat) > Se-BMF (75.24 μg/kg groat) > Se-BEF (64.76 μg/kg groat) > Se-BRG (21.21 μg/kg groat).This shows that processing also has a great influence on the distribution of selenium forms.

中文翻译：

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富硒苦荞（Fagopyrum tataricum L. Gaertn.）中的硒：其分子形态和加工过程中的变化

摘要 必需的微量矿物质硒 (Se) 对人类健康至关重要。苦荞是一种富含功能性黄酮类化合物的假谷物品种。为了研究陕西省富硒苦荞的性状，我们研究了不同加工方法对其营养成分和硒在富硒荞麦碎粒（Se-BG）、磨粉（Se-BMF）、挤压薄片（ Se-BEF) 和烤去壳 (Se-BRG)。Se-BG 中最高的总硒含量为 118.04 μg/kg。Se-BMF (110.55 μg/kg) 和 Se-BEF (98.55 μg/kg) 表现出较少的硒损失，而最大的硒损失记录在 Se-BRG (66.63 μg/kg) 中。硒和硒代蛋氨酸 (SeMet) 主要存在于谷蛋白中，其次是白蛋白。SeMet 含量遵循 Se-BG (76.21 μg/kg groat) > Se-BMF (75.24 μg/kg groat) >