1,5- diphenyl carbazide forms a pink complex in the presence of Cr(VI) ions in acidic solutions. The concentration of Cr(VI) was calculated from absorbance at 542nm using UV spectrophotometer
1,5-diphenyl carbazide forms a pink complex in the presence ofCr(VI) ions in acidic solutions. The concentration of Cr(VI)was calculated from absorbance at 542nm using UVspectrophotometer