谷物中的吡哆醇和吡哆醇葡萄糖甙

PYRIDOXINE AND PYRIDOXINE GLUCOSIDE CONTENT OF CEREALS

选取硬质小麦、软质小麦、大麦、小米、玉米、黑麦和高粱共４８个不同品种谷物，用偏磷酸溶液进行抽提，然后用高效液相色谱方法定量分析各种形式维生素Ｂ６的含量，比较不同种类谷物中维生素Ｂ６的存在形式及其含量的差异。结果表明：各种谷物中维生素Ｂ６的主要形式是吡哆醇和吡哆葡萄糖甙，几乎没有其他形式存在。不同谷物中吡哆醇和吡哆醇葡萄糖甙的含量差别较大，两种形式的比例也不相同。还根据两种形式维生素Ｂ６在人体内的分子生物利用率对各种谷物维生素Ｂ６的有效含量进行计算和评估。

Seven kinds of cereals were analysed for different B 6 vitamers using metaphosphoric acid extraction and quantitation with high performance liquid chromatography.The results revealed that pyridoxine(PN)and pyridoxine glucoside(PNG) were the predominant vitameric forms of vitamin B 6 cereals.Other vitameric forms of B 6 were not detected.The amounts of available vitamin B 6 in different cereals were estimated and compared according to the bioavailability of PNG in human.