中文摘要：

进口铜精矿放射性检测参考样品经均匀性和稳定性检验合格后,邀请8家权威实验室进行合作定值,结果无异常数据。研制的进口铜精矿放射性检测参考样品定值结果（Bq/kg）为：238^U,5036±85;232^Th,117.3±1.1;226^Ra,163^5±26;40^K,505.4±9.0。可应用于进口铜精矿中天然核素的检测。

英文摘要：

The sample of imported copper concentrate for analysis of radionuclides passed the test of homogeneity and stability,which was certified by 8 labs. There was no outlier according to certification of 8 labs,with good homogeneity and stability of the sample. The certification of 238^ U,232^Th,226^Ra,and 40^K of the reference sample were 5036±85（Bq/kg）,117.3±1.1（Bq/kg）,1635±26（Bq/kg）,505.4±9.0（Bq/kg）,respectively. The reference sample can be applied to analysis of natural radionuclides in copper concentrate.