原子吸收分析的准确度与精密度,在很大程度上依赖于仪器的性能。关于原子吸收测量的噪声与精密度已有不少报导。然而,在一些基本问题上,仍有不一致的看法,也存在一些不十分明确的问题。例如,光电倍增管的选择及其特性参数对测量信噪比的影响,光电倍增管的工作电压对信噪比的影响,光源强度的影响及空心阴极灯的噪声等。本工作对这些 The accuracy and precision of atomic absorption analysis are highly dependent on the performance of the instrument. There have been many reports on the noise and precision of atomic absorption measurements. However, there are still some inconsistent views on some basic issues as well as some problems that are not quite clear. For example, the choice of photomultiplier tube and its characteristic parameters on the measurement of signal to noise ratio, photomultiplier tube voltage on the impact of signal to noise ratio, the impact of light intensity and hollow cathode lamp noise. This work on these