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Table 3 The main peak of the FTIR spectrum of WO-RP and their assignments

From: Response surface optimization of biodiesel yield from pre-treated waste oil of rendered pork from a food processing industry

AssignmentWavelength peak, cm−1
C–H stretch (alkane)2850–30002990, 2909
C=H stretch (carbonyl)1670–18201689
C=C–C stretch (aryl)1400–16001498
C–O stretch (ether)1000–13001089, 1039
C–H send (alkyne)610–680631, 662