Figure 2. Plot of the iron(II) phenanthroline concentration against the absorbance measured in a standard cuvette with a thickness of 1 cm.

From

Experimental Approach for Efficiency Determination of Photocatalytic Hydrogen Evolution

Philipp Lanfermann, Christoph Weidmann, Janina Dege, Steven Celik, Alexander Tasch, Mona Christin Maaß, Thomas Waitz

World Journal of Chemical Education. 2021, 9(4), 185-189 doi:10.12691/wjce-9-4-11