Accession Number : AD0729336

Title :   Spectrophotometric Determination of Sulfate in Chrome Plating Baths.

Descriptive Note : Test rept.,

Corporate Author : FRANKFORD ARSENAL PHILADELPHIA PA

Personal Author(s) : Norwitz,George

Report Date : JUN 1971

Pagination or Media Count : 13

Abstract : An accurate, rapid spectrophotometric method is described for the determination of sulfate in chrome plating baths. An aliquot of the bath is treated with a mixture of hydriodic, hypophosphorous, and hydrochloric acids in a special distillation apparatus while passing nitrogen through the system. The hydrogen sulfide which results from the reduction of the sulfate is absorbed into ammonium hydroxide, lead citrate is added, and the yellowish-brown lead sulfide color is measured. (Author)

Descriptors :   (*ELECTROPLATING SOLUTIONS, SULFATES), (*SULFATES, *COLORIMETRIC ANALYSIS), CHROMIUM, SULFIDES, LEAD COMPOUNDS, CHEMICAL PRECIPITATION, PH

Subject Categories : Inorganic Chemistry
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE