The absorption spectra from the PCE answers with and with out a metal sample as well as the blank Answer that contains metal were recorded at home temperature employing a UV-Vis spectrophotometer (Jasco design V-730, Tokyo, Japan). The spectra ended up calculated from the range between 200 to 800 nm. https://lorenzoxymuc.blogunteer.com/27476416/what-does-2-fa-hcl-mean