摘要
目的介绍《食品中241Am测定》标准分析程序实验验证依据。方法根据标准分析流程进行全流程回收率、方法检测下限和去污试验;结果全程回收率76.26±4.1%,最小可探测下限为3.4×10-5Bq/g灰,方法对Po的去污系数(DF)大于103,对U、Th、Pu的DF均大于102,对237Np的DF大于60。结论全程回收率高且稳定,方法最小可探测下限可满足对食品中241Am限制量监测的要求,用243Am标准溶液和241Am标准参考物质全程验证实验结果表明符合很好。
Objective The briefly experimental verification for 《detennination of ^241Am in food》has been described. Methotis The overall recovery, the MDL of method and decontamination experiment has been done by standard analysis procedure. Results The overall recovery is 76.26 ± 4.1% , The MDL is 3.4 ± 10^-5 Bq/g ash , decontamination factor is higher than 103 for Po, 103 for U, Th, Pu and 60 for ^237Np. Conclusion The results showed that the overall recovery is quite high and reliable, the MDL of method is able to meet examining ^241Am limited values in foods. The obtained decontamination factors of recommended procedure can meet analysis of ^241Am in food examination. Verifying results of the procedure are satisfied by using ^243Am spike and ^241Am standard reference material.
出处
《中国辐射卫生》
北大核心
2005年第4期244-246,共3页
Chinese Journal of Radiological Health
关键词
食品检验
放化分析
电沉积
α能谱
Food Examination
Radiochemicalanalysis
Electrodeposition
α Spectrometer
