北京地区膳食摄入^(232)Th吸收入体液份额f_1值的探讨  

ESTIMATION OF FRACTION OF INGESTED ^(232)Th INTO BODY FLUID FOR PUBLIC ADULTS IN BEIJING AREA

作　　者：林莲卿[1] 

机构地区：[1]北京市放射卫生防护所

出　　处：《辐射防护》1992年第3期189-195,共7页Radiation Protection

摘　　要：从北京地区公众成年人^(232)Th 的膳食日食入量,空气日吸入量,以及骨中^(232)Th 的沉积量出发,利用 ICRP 30号报告中参考人的代谢参数和内照射的库室模型,估算了北京地区公众成年人膳食摄入^(232)Th 后经胃肠道向体液转移份额 f_1值。结果表明,对于公众中成年人0.005是 f_1值的合适代表值,是 ICRP 30号报告推荐值 f_1=0.0002的25倍。虽然 ICRP 推荐值并不用于公众,但可以对群体有所了解;而北京地区从实测数据资料出发导出的 f_1值可能是更适于公众的。Based on the measured values of the daily intake of ^(232)Th from diets and inhalation,the con-tent of ^(232)Th in bones of the public adults in Beijing area,and the models recommended in ICRP 30,thefraction of ingested ^(232)Th into body fluid through gastrointestinal tract,∫_1,of the public adults in Bei-jing area is estimated.The results show that 0.005 is the adequate representative value of ∫_1 for thepublic adults,which is 25 times greater than the value recommended by ICRP 30(0.0002).The I-CRP value is not applicable to the general public.However,it may be helpful to understand the situa-ton of a population.The ∫_1 value given by this paper,derived from measured data,may be moresuitable for the public.

关 键 词：膳食摄入 体液 f1值 钍232 

分 类 号：R144[医药卫生—公共卫生与预防医学]