The Effect of Ammonium Pyrrolidinedithiocarbamate (APDC) Complexing Agent on the Determination Of Copper Trace in Steel Using Atomic Absorption Spectrophotometry
Ahwaz Faculty of Petroleum Engineering, Petroleum University of Technology, Ahwaz (Iran)
DOI : http://dx.doi.org/10.13005/msri/040108
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A method of solvent extraction is described for concentrating and separating the copper from an aqueous alkaline solution (pH 9-10) of steel into an organic solvent prior to analysis by flame atomic absorption spectroscopy. In this research first, ammonium pyrrolidinedithiocarbamate (APDC) as a chelating agent, and tartaric acid as masking agent for ferric ion, were used then, solvent extraction, separation of copper from steel and subsequent determination of copper in the organic solvent were carried out. The copper content of four separate samples of each of the standard steels was extracted as a Cu/APDC complex into MIBK. The results obtained for steel samples were very near to the certificated values particularly when iron is added to the standard solutions. Thus, APDC could be used successfully in the extraction of copper from steel samples even when iron is not added to the standards.
KEYWORDS:Copper; copper trace; steel; ammonium pyrrolidinedithiocarbamate (APDC)
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942 Accepted on: 21 May 2007
