放射性杂质

在现有施肥水平下，磷肥中放射性杂质不会导致土壤放射性污染。

Radioactive impurity in phosphate fertilizer can 't cause pollution of soil .

将此工艺用于热分离实验，所得~（109）Cd样品中未检出其他放射性杂质，化学收率为99%。

No γ impurities were found in the ~ ( 109 ) Cd obtained . The chemical yield was 99 % .

在辐照结束时，其主要放射性杂质~（124）I占产品~（123）I的比率小于1.4%，整个分离过程不到4小时即可完成，总的化学收率在95%以上。

At the end of bombardment , the ratio of major radio-impurity 124I to the product 123I is less than 1.4 % . The process can be completed within 4 hours .

介绍了用电沉积法分离~（99）Tc~m洗脱液中α放射性杂质，并在低本底α计数器上测定其活度的方法。

The total alpha emitting impurities in ~ ( 99 ) Tc ~ m eluates of fission ~ ( 99 ) Tc ~ m generator have been separated by the electrodeposition method and measured by the low-level alpha counter .

描述了用核素活度计测定含有放射性核素杂质（124）I的样品中的123I的活度的方法。

A method is described for determination of 123 I activity with a radionuclide activity meter . In 123 I sample often exists 124 I as a radioactive impurity .

市售放射性同位素示踪剂中放射性杂质的鉴定

Identification of radionuclidic impurities in some commercial tracers