2000•Journal of Instrumental AnalysisRequires access

Highly Sensitive Spectrophotometric Determination of Trace Chromium(VI) in Electroplating Wastewater

Changrong Xia

Abstract

The fading reaction of arsenazo Ⅲ with was used to determine trace Cr(Ⅵ)in electroplating wastewater containing Cr(Ⅵ). The results show that the fading reaction has a high sensitivity in the medium of nitric acid, the molar absorptivity is 3.9×106 L·mol-1·cm-1, and Beer's law is obeyed for Cr(Ⅵ)in the range of 0.0～40.0 μg/L. Contents of Cr(Ⅵ)in electroplating wastewaters were determined with satisfactory results.

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Key concepts: Chemistry, Chromium, Electroplating, Molar absorptivity, Nitric acid, Wastewater, Fading, Nuclear chemistry