APLIKASI KEMOMETRIK UNTUK MENENTUKAN ASAM LEMAK BEBAS MINYAK GORENG SECARA NIR SPEKTROSKOPI

Abstract

Free fatty acids (FFA) is a  parameters to determine the quality of cooking oil. FFA in cooking oil can be determined by acidy-alcalimetry titration, GC or HPLC methods. These methods use  a lot of consumables and require a long time. The  aims of this research is to examine the NIR Spectroscopy method as an alternative for determining the FFA of cooking oil. This method is non-destructive, less preparation, does not use consumables and can be done in a short time. The research began by collecting FFA data from thirty samples and NIR  spectrum data for each sample. Through chemometric approaches, data obtained from the NIR  spectrum and analysis conventional FFA  were analyzed multivariately using software NIRCal Chemometric from Buchi . The calibration curve obtained can be used to prediction the FFA  of a cooking oil by plotting the results of the NIR Infrared spectrum  of the sample against the calibration curve .  The results show  that FFA values for several cooking oil sampel that use the NIR Spectroscopy method are relatively the same as conventional method so that the NIR Spectroscopy can be used as an alternative method to determine FFA  in cooking oil.