Figure 11. UV-VIS spectra of copper sulfate (solid line), copper glyphosate (dotted line), and copper glufosinate (dashed line)

From

Rapid and Sensitive Electrochemical, Spectroscopic and Spectroelectrochemical Detection of Glyphosate and Glufosinate and Their Copper Salts with Screen-printed Electrodes

F. Wetzel, T. Braun, T. Schindler, A. Habekost

World Journal of Chemical Education. 2021, 9(4), 152-162 doi:10.12691/wjce-9-4-8