2种洋葱中微量元素铁·锰与铜含量的测定  

Determination of Trace Elements Iron,Manganese and Copper in Two Kinds of Onions

作　　者：喻菊洪[1] 陈小芳[1] 段玲利[1] 郭茂霞 李华兰[1] 

机构地区：[1]绵阳师范学院化学与化学工程学院,四川绵阳621000

出　　处：《园艺与种苗》2014年第9期30-32,共3页Horticulture & Seed

摘　　要：[目的]测定2种洋葱中Fe、Mn、Cu微量元素的含量。[方法]采用硝酸和高氯酸（4＋1）分解样品，火焰原子吸收光谱法测定，分析2种洋葱中Fe、Mn、Cu微量元素的含量。[结果]洋葱中3种微量元素含量存在明显差别，其中，紫皮洋葱中元素含量大小排序为：Fe〉Mn〉Cu，黄皮洋葱中元素含量大小排序为Fe〉Cu〉Mn，紫皮洋葱中Fe的含量大于黄皮洋葱，紫皮洋葱中Mn、Cu的含量均小于黄皮洋葱，回收率在94.8%～110.0%，RSD〈1.7%。[结论]紫皮洋葱、黄皮洋葱中3种微量元素含量差异为微量元素缺乏症患者进行食疗提供了一定的数据参考。[Objective] The aim was to determine the trace elements iron, manganese and copper in two kinds of onions. [Method] The trace elements iron, manganese and copper in two kinds of onions were analyzed, with nitric and perchloric acid （4＋1） decomposition of the sample, flame atomic absorption spectrometry. [Result] The contents of three kinds of trace elements in onion had significant differences. Among which, the sort of element contents in purple onion was Fe〉Mn〉Cu, and the sort of element contents in yellow onion was Fe〉Cu〉Mn. the Fe content in purple onion was more than in yellow onion, and Mn, Cu contents in purple onion were less than in yellow onion. The recoveries were between 94.8%-110.0%, RSD〈1.7%. [Conclusion] The contents differences of three kinds of trace elements in purple onion and yellow onion provided data references for dietotherapy of trace elements deficiency patients.

关 键 词：原子吸收光谱法 紫皮洋葱 黄皮洋葱 微量元素含量测定 

分 类 号：O657.31[理学—分析化学]