【摘要】 采用仪器中子活化分析和放射化学中子活化分析测定了菠菜参考物质（ＮＩＳＴ－１５７０ａ）中的４０种元素。其中纯仪器分析测定了Ａｇ、ＡＩ．Ｂａ．Ｂｒ、Ｃａ、Ｃｅ、ＣＩ、Ｃａ、Ｃｒ、Ｃａ、Ｅｕ、崐Ｆｅ、Ｈｆ、Ｋ、Ｌａ、Ｍｇ、Ｍｎ、Ｎａ、Ｎｉ、Ｒｂ、Ｒｅ、Ｓｂ、Ｓｃ、Ｓｅ、Ｓｒ、Ｔａ、Ｔｂ、Ｔｈ、Ｖ、Ｚｎ崐和Ｚｒ等３１种元素：采用三个简单的放射化学流程测定了另外９种元素：通过际去主要干扰核素崐测定了Ｃｄ．Ｌｕ，Ｍｏ、Ｓｍ．Ｙｂ和Ｕ；采用ＮａＤＤＴＣ／ＣＨＣＩ３萃取测定Ｃｕ：通过酸性ＡＩ２Ｏ３无崐机交换柱吸附测定Ａｓ和Ｐ．该流程也适用于其它生物样品的多元素分析。还采用ＩＫ０法对２３５Ｕ的裂变干扰和Ｙ能谱干扰进行了校正更多还原

【Abstract】 Forty elements in NIST 1570a (or IAEA-331), an intercomparison material, spinach, have been determined using the NAA techniques. Among them, 31 elements, i.e. Ag, Al, Ba, Br, Ca, Ce, Cl, Co, Cr, Cs, Eu, Fe, Hf,K, La, Mg, Mn, Na, Ni, Rb, Re, Sb, Sc, Se, Sr, Ta, Tb, Th, V, Zn and Zr, were determined by employing INAA. A series of simple and quantitative radiochemical separation procedures were established for the determination of 9 additional elements, Among them, Cd, Lu, Mo, Sm, Yb and U were determined by removing the major interfering nuclide 82Br; Cu by 0.048mol/L NaDDTC/CHCl3 extraction from 1mol/L HCl medium; and As and P by using an inorganic exchange column of acid aluminum oxide(AAO). The interferences from fission products and γ spectrum of 235U have been corrected by the NAA software, ADVNAA.更多还原