摘要
本文用化学分离、电沉积和α谱测量联合分析方法测定了我国主要食物中^(239+240)Pu和^(238)Pu放射性含量。结果表明,主要食物中^(239+240)Pu和^(238)Pu含量都在(1—10)×10^(-4)Bq/kg范围,^(238)Pu含量低于^(239+240)Pu,茶叶中Pu放射性同位素含量偏高。
Radioactive plutonium isotopes in 16 samples of the main foodstuff collected from nine provinces and autonomous regions of China have been determined by means of radiochemical separation, electrodeposition and alpha-spectrum measurements. The results show that specific radioactivities of both 239+240Pu and 238 Pu in the foods-tuft vary from 1×10-4Bq/kg to 1×10-3 Bq/kg, the concentrations of 238Pu in foodstuff are less than 239+240Pu. However, by way of exception, the specific radioactivities of 239+240Pu and 338Pu in tea samples are 7.41 ×10-3 Bq/kg and 1.33×10-3 Bq/kg respectively.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1990年第2期55-57,40,共4页
Environmental Science
