“…Another quantitative calibration technique is the chemometric method, which is capable of providing precision, accuracy, and analytical information and has been widely used in recent years. One or more parameters (Talpur et al, 2014), such as peroxide value (Yu, Voort, & Sedman, 2007), total polar compounds (Ng, Wehling, & Cuppett, 2011), iodine value (Hendl, Howell, Lowery, & Jones, 2001), free fatty acid, conjugated diene and triene (Innawong, Mallikarjunan, Irudayaraj, & Marcy, 2004), and carbonyl value (Wang, Yu, Chen, Yang, & Zhang, 2014), could be determined by establishing the relationship between the chemical parameters and spectral data of oils, using chemometric methods involving partial least squares (PLS), multiple linear regression (MLR), and principal component regression (PCR) analyses.…”