Department of Physics, University of Warwick, Coventry, CV4 7AL, UK.
Centre for Engineering Photonics, Cranfield University, Cranfield, MK43 0AL, UK.
Sci Rep. 2021 Feb 11;11(1):3682. doi: 10.1038/s41598-021-83322-w.
Contaminants in water were studied using ultraviolet absorption with light emitting diode and deuterium lamp sources, and a thresholding detector. The absorption spectra of potassium hydrogen pthalate, clothianidin, tryptophan, thiamethoxam, uric acid and metaldehyde were obtained in the range 200-360 nm. Only metaldehyde was not suitable for detection in this range. For the other contaminants, and mixtures of pairs of compounds, the transmitted signal could be approximately described with a simple spectral model of the source-absorption-detector system. Combined measurements at two wavelengths could allow relative concentrations in certain mixtures to be determined, and real-time absorption measurements were demonstrated in a flume.
采用紫外吸收法，使用发光二极管和氘灯作为光源，以及阈值探测器，研究了水中的污染物。在 200-360nm 范围内，获得了邻苯二甲酸氢钾、噻虫嗪、色氨酸、噻虫胺、尿酸和多聚甲醛的吸收光谱。在该范围内，只有多聚甲醛不适合检测。对于其他污染物和两种化合物的混合物，通过源-吸收-探测器系统的简单光谱模型，可以近似描述透射信号。在两个波长下进行组合测量，可以确定某些混合物中的相对浓度，并在水槽中进行了实时吸收测量。
