检测器是分光光度计的关键部件之一,是分光光度计主要性能指标的限制性元件。早期的光度计使用障层光电池和硒光电池作为检测器,灵敏度和波长测量范围都受到很大的限制。使用蓝敏和红敏光电管后,提高了灵敏度和波长测量范围,但由于光电流不能放大,性能提高有限。光电倍增管的应用使紫外-可见分光光度计的性能大大提高。因 The detector is one of the key components of a spectrophotometer and is a limiting component of the main performance indicators of a spectrophotometer. Early photometers used a barrier photovoltaic cell and a selenium cell as a detector, all of which limited sensitivity and wavelength measurement. The use of blue and red sensitive photocells increases the sensitivity and wavelength measurement range, but the performance improvement is limited due to the inability to amplify the photocurrent. The use of photomultiplier tubes greatly enhances the performance of UV-Vis spectrophotometers. because