SIMULTANEOUS DETERMINATION OF TRACES OF URANIUM AND THORIUM IN SEAWATER BY ISOTOPE DILUTION MASS SPECTRO-METRIC ANALYSIS METHOD(IDMS)     

孟宪厚  黄达峰  宋新 《海洋学报(英文版)》1985,4(4):573-578

The separation and simultaneous determination of the traces of U and Th in seawater by IDMS is described. The detection limits of this method are 2.4×10-9 g for Th and 1.1×10-8 g for U. The concentrations of U and Th in seawater nearby Xiamen were measured, which are 3.20 ppb and 7.73 ppt respectively. The precisions fo the method are ±1.7% for U and ±3.6% for Th respectively.  相似文献   

质谱同位素稀释法同时测定海水中痕量铀和钍   总被引：1，自引：0，他引：1       下载免费PDF全文

孟宪厚  黄达峰  宋新 《海洋学报》1985,7(6):728-732

取水样10l,用0.45μm滤膜过滤,加入适量235U和230Th稀释剂,以Fe(OH)₃沉淀载带法富集U,Th,进而在CL 5209型萃淋树脂柱上完成U、Th及Fe的分离,并在同一条样品带上完成U和Th的质谱测定,方法的检出限是2.4×109g钍和1.1×10-8g铀,测定海水中铀和钍的精密度分别为±1.7%和±3.6%。  相似文献