光电倍增管中光阴极和二次极的钾、铯含量是决定光电倍增管性能的关键因素。本文介绍了光电倍增管的原子吸收光谱分析方法,其中包括加热蒸发法与分割法。借助于这些方法,可以定量地测定光阴极与二次极的碱金属含量。实验管是不同工艺条件下制成的双碱光电倍增管-GDB 44,实验的结果与工艺人员的实践经验及有关的理论符合得很好。很清楚,这种方法不仅准确、可靠、而且经济方便。 Photomultiplier tube cathode and secondary potassium, cesium content is to determine the key factor PMT performance. This paper introduces the atomic absorption spectrometry of photomultiplier tubes, including the heating evaporation method and the segmentation method. With these methods, it is possible to quantitatively determine the alkali metal contents of the photocathode and the secondary electrode. Experimental tube is made under different conditions of double-alkali photomultiplier tube-GDB44, the experimental results and the technical staff of the practical experience and the relevant theory in good agreement. Clearly, this method is not only accurate, reliable, and economical.