摘要
用电感耦合等离子体原子发射光谱法 (ICP AES)测定了 11种东北大豆中大量、小量和微量元素。比较了两种湿法消解方法 ,HNO3 HClO4,HNO3 H2 SO4和干灰化法对分析结果的影响。由于大豆含有较多的油脂 ,用混合酸消解时费时较长且需加入较多的酸 ,从而可能产生较高的背景空白 ,因此对大豆样品的前处理采用干灰法较为合适。大豆中钾和磷是大量元素 ,本工作还研究了钾和磷对其他元素测定的影响。结果表明 ,大豆中钾和磷对其他微量元素的测定没有影响。结果还表明 ,这
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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期673-675,共3页
Spectroscopy and Spectral Analysis