This paper deals mainly with the extraction of geological and hydrogeological information from deep strata through the comparative analysis of major elements , minor elements and trace elements in rocks and in relics of dried fountains by means of neutron activation analysis ( naa ) 摘要利用中子活化测试结果，对岩石及泉水乾涸残馀物中常量及微量元素的进行分析对比，以?解深层岩体有关的地质与水文地质信息。
Abstract : analytical methods for impurities in tungsten and tungstic compounds in recent 10 years were reviewed . among them were atomic emission spectrometry ， atomic absorption spectrometry ， mass spectrometry ， electrochemical analysis ， spectrophotometry and activation analysis . 53 references were cited 文摘:综述了近10多年来钨及其化合物中杂质元素的分析方法，涉及方法包括原子发射光谱法、原子吸收光谱法、分光光度法、质谱法、电化学分析法以及活化分析法等。
The contents of 8 rare earth elements in chloroplasts of brassia napus were determined by instrumental neutron activation analysis . the results indicated that there were trace amounts of rees in the chloroplasts , which corresponded to 1 atom of rees per 2000 chlorophyll molecules . this content was lower than the microelements already known essential for the process of photosynthesis such as fe , mn and cu 用中子活化分析测定了油菜叶绿体中的稀土元素含量。结果表明叶绿体中含有微量稀土，其含量相当于每个稀土原子对应约2000个叶绿素分子，低于fe , mn , cu等必需元素。
