Palm oil analysis in adulterated sesame oil using chromatography and FTIR spectroscopy

被引:21
作者
Rohman, Abdul [1 ,2 ]
Man, Yaakob B. Che [1 ]
机构
[1] Univ Putra Malaysia, Halal Prod Res Inst, Serdang 43400, Selangor, Malaysia
[2] Gadjah Mada Univ, Fac Pharm, Dept Pharmaceut Chem, Yogyakarta, Indonesia
关键词
Adulteration; FTIR spectroscopy; Gas chromatography; RBD-palm oil; Sesame oil; AUTHENTICITY; FATS;
D O I
10.1002/ejlt.201000369
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
This study highlights the application of two analytical techniques, namely GC-FID and FTIR spectroscopy, for analysis of refined-bleached-deodorized palm oil (RBD-PO) in adulterated sesame oil (SeO). Using GC-FID, the profiles of fatty acids were used for the evaluation of SeO adulteration. The increased concentrations of palmitic and oleic acids together with the decreased levels of stearic, linoleic, and linolenic acids with the increasing contents of RBD-PO in SeO can be used for monitoring the presence of RBD-PO in SeO. Meanwhile, FTIR spectroscopy combined with multivariate calibration of partial least square (PLS) has been successfully developed for the detection and quantification of RBD-PO in SeO using the combined frequencies of 3040-2995, 1660-1654, and 1150-1050 cm(-1). The values of coefficient of determination (R-2) for the relationship between actual versus FTIR-calculated values of RBD-PO in SeO and root mean square error of calibration (RMSEC) obtained are 0.997 and 1.32% v/v, respectively. In addition, using three factors, the root mean square error of prediction (RMSEP) value obtained using the developed PLS calibration model is relatively low, i.e., 1.83% v/v.
引用
收藏
页码:522 / 527
页数:6
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