The absorption spectra on the PCE methods with and without a steel sample together with the blank Option that contains steel have been recorded at room temperature employing a UV-Vis spectrophotometer (Jasco product V-730, Tokyo, Japan). The spectra were being measured while in the range from 200 to 800 nm. https://2-fahcl11009.shoutmyblog.com/28946343/not-known-facts-about-2-fa-hcl