photoelectric microphotometer

例句：

1. 1. This photoelectric microphotometer is used for measuring the concentration ofpollutants in water samples.
   这台光电微光度计用于测量水样中污染物的浓度。
2. 2. The researcher used a photoelectricmicrophotometer to analyze thechemical composition of the sample.
   研究者使用光电微光度计分析了样品的化学成分。
3. 3.The photoelectric microphotometer was usedto detect the presence of bacteria in thefood samples.
   光电微光度计被用来检测食品样本中的细菌存在。