Zhang Zhuo-yong, Chen Hang-ting, Wang Dan, Guo Li-ping, Liu Si-dong, Liu Jie, Zeng Xian-jin
Department of Chemistry, Capital Normal University, Beijing 100037, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Aug;22(4):673-5.
Major, minor and trace elemental contents in northeast China soybeans were determined by using inductively coupled plasma atomic emission spectrometry (ICP-AES). Three different sample digestion methods including two wet digestions, HNO3-HClO4 and HNO3-H2SO4 and a dry ash method were compared. Owing to the high oil content in soybeans, long time is needed and access acid should be added with mixed acid digestion methods, which may result in higher sample blank. Therefore, the dry ask method would be more proper for the pre-treatment of soybean samples. Potassium and phosphorus are major elements in soybeans, so the effect of potassium and phosphorus on the other elements was investigated. Results showed that the potassium and phosphorus did not affect the determination of other trace elements. There are not significant differences in trace elemental contents for the eleven northeast China soybeans.
采用电感耦合等离子体原子发射光谱法（ICP-AES）测定了中国东北地区大豆中的常量、微量和痕量元素含量。比较了三种不同的样品消解方法，包括两种湿法消解（HNO₃-HClO₄和HNO₃-H₂SO₄）和一种干法灰化法。由于大豆含油量高，采用混合酸消解方法时需要较长时间且应加入过量酸，这可能导致较高的样品空白。因此，干法灰化法更适合大豆样品的预处理。钾和磷是大豆中的主要元素，因此研究了钾和磷对其他元素的影响。结果表明，钾和磷不影响其他微量元素的测定。中国东北地区的11种大豆在微量元素含量上没有显著差异。
