HUBUNGAN NETRALISASI TERHADAP SIFAT FISIKO KIMIA PADA LEMAK BIJI TENGKAWANG

Abstract

There are more than 13 species of Tengkawang tree in Indonesia, mainly grown in  Kalimantan and a few in Sumatera. Tengkawang species of a valuable tengkawang kernel  that up to now just harvested from the natural forest. At the end of kernel production  period, the trees can be cut to produce valuable timber for playwood and sawn timber  industries. In this study, Tengkawang kernel was extracted by soxhlet extraction apparatus  using petroleum ether as solvent. The extraction yields a yellow fat and after the process of  purification/neutralization conducted, it was found the acid number 14.32 decrease to  10.22, free fatty acids 7.196% decrease to 5.14%, saponification 198.23 mgKOH/gram  sample decrease to 178.23 mgKOH/gram samples, peroxide number mgO2 4.91/100g  sample to 3.24 mgO2/100g samples and materials do not saponified 1.13% decrease to  1.12%, and the yield on solvent extraction with 43.50%.