Instrumental neutron activation analysis may need to correct for matrix interferences caused by fast neutron induced threshold reactions. The very low Al mass fraction in bovine liver Standard Reference Material (SRM) has eluded certification due to such complications. Cold neutron beam irradiation absent fast neutrons provides a possible alternative, which has been applied for the first time to determine Al in bovine liver SRM 1577c. The Al mass fraction was determined to be (0.80 ± 0.15) mg/kg using the traditional single peak-fitting method, and (0.78 ± 0.23) mg/kg using a new physics model-based spectral fitting method.

中文翻译：

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仪器冷中子活化分析法测定牛肝 SRM 1577c 中的铝

仪器中子活化分析可能需要校正由快中子诱发阈值反应引起的基质干扰。由于此类并发症，牛肝标准参考材料 (SRM) 中极低的铝质量分数未能获得认证。没有快中子的冷中子束辐照提供了一种可能的替代方法，该方法已首次应用于测定牛肝 SRM 1577c 中的铝。使用传统的单峰拟合方法确定铝质量分数为 (0.80 ± 0.15) mg/kg，使用基于新物理模型的光谱拟合方法确定为 (0.78 ± 0.23) mg/kg。