人骨骼中^(228)Th、^(230)Th和^(232)Th含量的同时测定  

SIMULTANEOUS DETERMINATION OF ^(228)Th,^(230)Th AND ^(232)Th IN BONE SAMPLE

作　　者：吕慧敏[1] 侯庆梅[1] 李文元[1] 

机构地区：[1]卫生部工业卫生实验所

出　　处：《辐射防护》1989年第3期-,共4页Radiation Protection

摘　　要：本文介绍了用α谱仪同时测定人骨骼中^(228)Th、^(230)Th和^(232)Th含量的方法。样品用浓 HNO_3和 H_2O_3湿灰化,草酸钙共沉淀载带、CL-5208萃淋树脂和743阳离子交换树脂联合分离后,电沉积制源,在低温半导体α谱仪上测量。该方法对^(234)Th的全程回收率为95.0±1.7%,对铀和镭的去污系数分别为6.3×10~4和1.5×10~3,对^(228)Th、^(230)Th、^(232)Th 的探测下限分别为0.432、0.135和0.108Bq/kg(鲜重)。An analytieal method fof the simultanous determination concentration of ^(228)Th,^(230)Th and ^(232)Th in bone was introduced in this artice.Samples were wet-ashed with concentrated HNO_3 and 30% H_2O_2.Thorium was copreeipitated with calcium oxalate and separated by CL-5208resin and 743 cation exchange resin electrodeposited on a platinum andfollowed by alpha spectrometry measurement.The contents of _(223)Th,^(230)Thand ^(232)Th in human bones were determined.The lower detectable,limitsof the metnod were 0...

关 键 词：人骨骼样品 钍同位素 联合测定 

分 类 号：TL7[核科学技术—辐射防护及环境保护]