Determination of Trivalent Chromium Ions in Chromium Plating Solutions by Ultraviolet-Visible Spectrophotometry.

摘要

The chemical literature lacks a specific and direct analytical method for adequately monitoring trivalent chromium ions (Cr(III)) in chromium plating solutions during the plating process. In this report, a specific and direct method is presented providing acceptable analysis and monitoring of the trivalent chromium in this process. The optimum operating range of the trivalent chromium is 7.5 g/l maximum in the chromium plating solutions. The resulting precisions are in the range of 0.5 to 1.0 g/l, providing adequate monitoring of these solutions supported by four years of testing. (rrh)