Abstract
A simple rapid method for determination of nickel in hydrogenated oil was investigated. Extraction of nickel with hydrochloric acid instead of asking prior to the atomic absorption spectro-photometry was found suitable for routine analyses. A trace amount of nickel in hydrogenated oil could be sufficiently recovered by the following procedure : 20g of the oil were dissolved in 50100ml of carbon tetrachloride and then extracted three times with 50ml of 0.5N hydrochloric acid solution. Analytical results for several hydrognated oils obtained by this method agreed well with those by the JOCS method. This method may possibly be applicable to margarine and shortening present in various emulsifiers.
