光电倍增管仍然是各种紫外、可见及近红外光电测量装置中的主要光电变换元件。整个光电测量装置的信噪比与光电倍增管的性能与工作状态密切有关。Ingle等研究过定量光度法中光子计数与直流测量的信噪比、紫外可见分光光度法的信噪比及原子吸收分光光度法的信噪比。我们也对原子吸收仪器光电测量系统的信噪比进行过研究。在上述这些工 Photomultiplier tubes are still the main optoelectronic transducers in a wide range of UV, visible and near-infrared photodetectors. The signal-to-noise ratio of the whole photoelectric measuring device is closely related to the performance and working status of the photomultiplier tube. Ingle et al. Studied the signal-to-noise ratio of photon counting and dc measurement, the signal-to-noise ratio of UV-visible spectrophotometry and the S / N ratio of atomic absorption spectrophotometry in quantitative spectrophotometry. We also studied the signal-noise ratio of the atomic absorption spectrometer. These workers in the above