Spectrophotometric Determination of Hg (II) Using (E)-2-(4,5-bis(4-methoxyphenyl)-1H-imidazol-4-yl) diazenyl) benzoic acid as analytical reagent. Journal of Pharmaceutical Negative Results. Published online September 15, 2022:530-536. doi:10.47750/pnr.2022.13.S01.65