Determination of selenium in silver plating solution by automated hydride generation-ICP-AES.

Abstract

Determination of selenium in silver plating solution was studied by automated hydride generation-ICP-AES (HG-ICP-AES). The sample was decomposed with nitric and sulfuric acids. Loss of selenium by volatilization during decomposition was not observed. Selenium was seperated prior to the analysis by distillation as the bromide in order to eliminate the effect of coexisting elements. Both selenium(IV) and (VI) were quantitatively recovered by this distillation. In the plating solution, there were large amounts of coexisting elements, but these elements did not interferece with the distillation of selenium. Selenium in the distillate was determined by HG-ICP-AES. This method was applied to the determination of selenium in actual silver plating solutions. The recoveries of this method were 96104% and the analytical results were in good agreement with those from the spectrophotometric method. The relative standard deviations were 1.54.3%.