In 2017, JRC-Geel organised a proficiency test for 120 participants on the massic activity determination of ¹³¹I, ¹³⁴Cs and ¹³⁷Cs in maize powder. The proficiency test reference material was produced by spiking blank maize powder. The material was characterised for its radioactive content using γ-ray spectrometry. The z scores of the reported massic activity were acceptable in 92% of the results for ¹³¹I, and in 94% for both ¹³⁴Cs and ¹³⁷Cs. The ζ scores were consistent with the reference value for 66% of the results for ¹³¹I, 56% for ¹³⁴Cs and 68% for ¹³⁷Cs.

中文翻译：

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玉米粉中131I，134Cs和137Cs能力测试的评估。

2017年，JRC-Geel组织了120名参与者的能力测试，确定了玉米粉中¹³¹ I，¹³⁴ Cs和¹³⁷ Cs的质量活性。通过添加空白玉米粉制成能力测试参考材料。使用γ射线光谱法对该材料的放射性含量进行表征。对于¹³¹ I，所报告的质量活动的z分数在92％的结果中是可接受的，对于¹³⁴ Cs和¹³⁷ Cs而言，均为94％。ζ分数与¹³¹ I结果的66％，¹³⁴ Cs的56％和¹³⁷ C的68％的参考值一致Cs。