在吸收光谱类仪器中,光谱带宽是一个重要的参数,对仪器的测量性能有很大的影响。为了减小仪器的分析误差,应根据需求设置适当的光谱带宽。文章阐述了光谱带宽的概念,分析了光谱带宽对光谱能量分布、吸收波长及吸光度的影响,为提高仪器的测量性能提供参考。 Spectral bandwidth is an important parameter in absorption spectroscopy instruments and has a large impact on the instrument’s measurement performance. In order to reduce the analytical error of the instrument, the appropriate spectral bandwidth should be set according to the requirement. The article expounds the concept of spectral bandwidth, analyzes the effect of spectral bandwidth on spectral energy distribution, absorption wavelength and absorbance, and provides references for improving the measurement performance of the instrument.