北京地区居民骨中钾含量  

Potassium Concentration in Bone of Beijing Residents

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》1994年第1期50-54,共5页Radiation Protection

摘　　要：用原子吸收光谱法测定了北京地区６５例居民骨灰中钾（下用Ｋ表示）含量。结果表明，骨灰中Ｋ含量呈对数正态分布，范围为０．７５－８．４４ｇ／ｋｇ（骨灰），算术平均值和单次标准差分别为２．４０和１．５２ｇ／ｋｇ（骨灰）．中位数为２．０６ｇ／ｋｇ（骨灰）；其中乳儿期（＜１岁）最高为４．８８ｇ／ｋｇ（骨灰），幼儿期（２－５岁）最低为１．５９ｇ／ｋｇ（骨灰），青春期（１１－２０岁）次低为１．８８ｇ／ｋｇ（骨灰）。湿骨中Ｋ含量的重量百分比为０．０７％。由此导出骨中￣４０Ｋ的比活度为２２ｍＢｑ／ｇ（湿骨），全骨中￣（４０）Ｋ的总活度为２２０Ｂｑ。骨中￣（４０）Ｋ所致骨组织的年吸收剂量为９５μＧｙ。This paper presents the measuring results of K concentration in bone ash samplesof 65 residents in Beijing area by atomic absorption spectrum. The results indicate that the Kconcentrations in bone ash is logarrithmic normal distribution,ranging level is 0.75-8.44g/kg ash,the average and standard deviation is respectively 2.40 and 1.52 g/kg ash. Thehighest concentration (4.88 g/kg ash)appears in infentile stage (<1 y),the lowerst con-centration(1.59 g/kg ash)appears in young stage(2-5y). The lower concentration(1.88g/kg ash)appears in adolescence(11-20 y). The K concentration in wet bone as a percent-age of weight is 0.067%. The specific activities of K-40 in bone is about 22 mBq/g wetbone. The total radiactivity of K-40 in whole bone is 220 Bq.The annual absorbed dose isreceived in adult bone from K-40 is estimated to be 95μGy.

关 键 词：骨 年龄 性别 钾40 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]