72型分光光度计是我国目前广泛使用的比色分析仪器。本仪器所使用的光源灯丝容易变形或烧坏,同时,由于仪器受到震动或更换灯泡时位置不正确等,都会改变入射光的方向,而造成较大的波长误差。因此,当长时间地使用仪器或更换灯泡以后,都必须对仪器的波长进行检定和调整。本方法是采用干涉滤光片对仪器进行波长 72 spectrophotometer is currently widely used colorimetric analysis equipment. The light source used in this instrument is easy to deform or burn out. At the same time, the vibration of the instrument or the incorrect position of the lamp will change the direction of the incident light, resulting in larger wavelength error. Therefore, after using the instrument for a long time or changing the lamp, the instrument’s wavelength must be checked and adjusted. This method is the use of interference filters on the instrument wavelength