- 作者： --
- 作者服務機構： Institute of Chemical Sciences, University of Peshawar, 25120, Peshawar, Pakistan
- 中文摘要： To convert vegetable edible oils into vanaspati ghee, nickel is used as a catalyst in the hydrogenation process. A simple and fast method for the trace level determination of nickel in ghee is reported. In this work different methods were applied for the extraction of residual nickel from ghee samples. Using toluene, benzene and carbon tetrachloride as organic solvents, an acid mixture was used for the extraction of nickel. Extracted nickel was quantified with atomic absorption and colorimetric methods. Among the organic solvents, toluene proved to be the best solvent mediating a 95% extraction of nickel from ghee samples. Nickel was extracted and determined in ten different brands of ghee and in all samples its amount was well above the permissible limit of WHO (0.2 μg/g). Other metals like lead, zinc, copper, and cadmium were also determined and their concentrations were found to be much below the WHO permissible limits.
- 英文摘要： --
- 中文關鍵字： Hydrogenated edible oil; Nickel formate catalyst; Solvent extraction; Spectrophotometric quantification.
- 英文關鍵字： --
