The interlaboratory comparison that 148 laboratories participated was performed to understand the validity and variability of measurements with NaI(Tl) scintillation detectors for samples near the standard limit for radioactive cesium in general foods in Japan. Brown rice grains with certified massic activity of radioactive cesium were used as test samples. The medians of the reported massic activities of radioactive cesium, 134Cs, and 137Cs in brown rice grains agreed with the reference values. On the point of view for inspection, more than 92% of the reported values were within the acceptable range.

中文翻译：

---

通过实验室间比较验证 NaI(Tl) 闪烁探测器对糙米样品中放射性铯的测量可比性

进行了 148 个实验室参与的实验室间比较，以了解使用 NaI(Tl) 闪烁检测器对接近日本一般食品中放射性铯标准限值的样品进行测量的有效性和可变性。具有经认证的放射性铯质量活度的糙米粒被用作测试样品。所报告的糙米粒中放射性铯、134Cs 和 137Cs 的质量活度的中位数与参考值一致。从检查的角度来看，92%以上的报告值都在可接受的范围内。