Rapid determination of nickel in edible fats by atomic-absorption spectrophotometry

Abstract

The determination, by atomic-absorption spectrophotometry, of small amounts of nickel in edible fats is described. Nickel is extracted from the samples with 10 per cent. nitric acid in the presence of carbon tetrachloride, to break the emulsion, and the aqueous layer is aspirated directly to determine the nickel. The method requires only 15 minutes for completion, and the detection limit for nickel is better than 0·1 p.p.m.