ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 33, Number 3
JKCSEZ 33(3)
June 20, 1989 

A method was presented for the analysis of trace metals in iron oxide ore. The method utilized ammonium pyrrolidinedithiocarbamate (APDC)-methyl isobutyl ketone (MIBK) extraction procedure and analysis by atomic absorption spectroscopy (AA). Citrate at pH 8∼10 for the determination of Co, Ni and Cu or tiron at pH 6∼7for the determination of Mn and Cu was added as a masking agent to prevent extraction of Fe(Ⅲ) into the organic phase. Reduction of solubility of MIBK in water was achieved by addition of NaCl as a salting-out agent. Back extraction of the MIBK extracts with aqueous HNO3 was also studied to increase the stability of metal extracts.