Abstract: The measurement conditions of absorption spectroelectrochemistry of Cr(Ⅲ) were investigated. The determination method of Cr(Ⅲ) and Cr(Ⅵ) in electroplating solution was proposed. The results show that the best sensitivity was obtained when atomic absorption spectrophotometer and hollow cathode light source were in place of the UVspectrophotometer and deuterium lamp was used for measurement absorption spectroelectrochemistry of Cr(Ⅲ). The technique yields increase 1.7 times in sensitivity compared with west method.

Key words: Absorption spectroelectrochemistry, Chromium determination, Electroplating solution