ultraviolet spectrogram

例句：

1. 1. The researcher used a UV spectrogram to analyze the chemical composition of the sample.
   研究员使用紫外线光谱图分析了样品的化学成分。
2. 2.In this study, we used an ultraviolet spectrogram to detect the presence of pollutants in the environment.
   在本研究中，我们使用了紫外线光谱图来检测环境中污染物的存在。
3. 3. The UV spectrogram revealed that there were traces of organic matter in the water.
   紫外线光谱图显示水中有微量有机物质的痕迹。