中子活化分析法研究镧在小麦根中的分布和存在形态  

STUDY OF CHEMICAL BEHAVIOR OF LANTHANUM IN WHEAT ROOTS BY NEUTRON ACTIVATION ANALYSIS

作　　者：张智勇[1] 李福亮[1] 肖海清[1] 柴之芳[1] 

机构地区：[1]中国科学院高能物理研究所核分析技术重点实验室,北京100039

出　　处：《核化学与放射化学》2003年第3期169-172,共4页Journal of Nuclear and Radiochemistry

基　　金：国家自然科学基金资助项目(19935020);中国科学院重要方向性资助项目(KJCX N01)

摘　　要：用中子活化分析结合分级提取及透射电镜观察,研究了稀土元素镧在小麦根中的分布和存在形态。研究结果表明,镧被根吸收以后主要存在于细胞壁和细胞间隙中,且结合十分紧密,用强配位剂EDTA才能将其提取出来。未在根细胞内观察到可溶态镧。Interactions between lanthanum and wheat roots are studied by a sequential extractive process combined with instrumental neutron activation analysis as well as transmission electronic microscopy. The results show that La mainly combines with cell wall material and the combination is extremely firm and it can only be released by powerful chelators, such as EDTA. No soluble intracellular La is determined by this method.

关 键 词：中子活化分析 镧 小麦 根 分布 形态 细胞壁 细胞间隙 稀土元素 

分 类 号：S512.1[农业科学—作物学] S143.72