As crude oil price reach a new high, the need for developing alternate fuels has become acute. Alternate fuels should be economically attractive in order to compete with currently used fossil fuels. In this work, biodiesel (ethyl ester) was prepared from waste cooking oil collected from a local restaurant in Halifax, Nova Scotia, Canada. Ethyl alcohol with sodium hydroxide as a catalyst was use...

Results are presented from an NMKL (Nordic Committee on Food Analysis) collaborative study of a method for the determination of cholecalciferol (vitamin D3) in foods. The method is based on the addition of an internal standard (vitamin D2), followed by saponification and extraction with n-heptane. The fraction that contains vitamin D2/D3 is separated by preparative normal-phase liquid chromatog...

The reused of cooking oil had been widely found in Indonesia whereas it is dangerous for health due to its carcinogenic properties. Purification used extensively investigated using various methods such as adsorption. Carbon-based materials are the common adsorbent cause having large capability adsorb organic and inorganic compound. Activating carbon surface affected higher pores adsorption pote...