Determination of antimony in lead, zinc concentrates and other smelter products by atomic-absorption spectrophotometry after separation by n-butyl acetate extraction of the chloro-complex.
An extractive atomic-absorption spectrophotometric (AAS) procedure is developed for fast and accurate determination of up to 20 mug/g antimony in lead and zinc concentrates and other smelter products. The procedure involves digestion of the sample with potassium bisulphate and sulphuric acid, addition of hydrazine to reduce all antimony to Sb(III), reoxidation to Sb(V), extraction of the chloro-complex of antimony(V) with n-butyl acetate, and AAS analysis of the organic phase for antimony.
Murti
S S
SS
Process Laboratory, Hindustan Zinc Limited, Visakhapatnam-530 015, A.P., India.
Rajan
S C
SC
Subrahmanyam
J
J