“…applied in Fe speciation, e.g. ICP-AES method [12], capillary electrophoresis with ultraviolet detection method [13], flame atomic absorption spectrometry [14], ion selective membrane potentiometric sensor [15], combination of sequential injection analysis and flame atomic absorption spectrometry [16,17], microcolumn ion chromatography with UV-Vis detection [18] as well as combination post-column derivatization HPLC or flow injection technique method and visible absorbance detection [3,13,16] were also reported. Regarding these spectrophotometric methods, iron has been determined using, e.g.…”