[Evaluation of the usefulness of spectrophotometric method based on the reaction of formation of silic-molybdenum blue for determination of silica in hydrogenated fat].

The spectrophotometric method based on the reaction of formation of silic-molybdenum blue for determination of silica (silicon dioxide) in hydrogenated fat was developed. Determination limit of silica in this method was 15.6 mg/kg and average recovery 77.77%. Using this method the content of silica in the edible fat (margarine) taken from the market was determined. The samples of margarine before determination of silicon dioxide were mineralised and than the analyte was concentrated. The silica was not found in the margarine samples at levels above the determination limit of spectrophotometric method i.e. 15.6 mg/kg.