探讨了X-射线荧光光谱法快速测定粮食中镉含量的效果，并将这种方法与石墨炉原子吸收光谱法进行比较。结果表明，X-射线荧光光谱法镉检出限为0.026 mg/kg；定量限为0.061 mg/ kg；仪器准确性、重复性以及稳定性均符合要求；台间差无显著性差异。X-射线荧光光谱法简单、 操作方便、灵敏度高、无环境污染。可应用于现场收购，及时将镉超标粮食与非超标粮食分类存放， 防止二次污染，对确保粮食质量安全具有重要意义。
The effect of rapid determination of cadmium content in grain by X-ray fluorescence spectrometry was discussed, which was compared with that by graphite furnace atomic absorption spectrometry. The result showed that the detection limit was 0. 026 mg/kg and limit of quantitation was 0.061 mg/kg; all of the accuracy, repeatability and stability of the instrument conformed to the requirements; there were no significant differences between measurement stations. The method is simple, convenient, with high sensitivity and without environmental pollution, and is suitable for grain depots to store grain with cadmium content over standard and non over standard separately when loading grain in order to prevent secondary pollution, which is of great significance to ensure food quality and safety.