2.2. Analytical method.2-Phenethyl alcohol-derived fatty acid esters (2-phenethyl esters of C4 - 18 fatty acids) were analysed by GC - MS and GC - FID.? The parameters of GC - MS - FID were set according to our previous study (Li et al, 2014). Proton NMR spectra were recorded. On a 300 MHz spectrophotometer with chemical shift values reported in D units (part per million) relative to tetramethylsilane.TLC was done on pre-coated 0.2 mm Merck silica gel 60 F254 plates. High-resolution atmospheric pressure chemical ionisation (HR-APCI). Mass spectra were obtained using microTOF LCMS (Bruker Biospin Pte Ltd, Bremen Germany). The, synthesised compounds found. In esterified samples or transesterified oil samples were identified through mass spectral analysis and comparing their. Mass spectra with WILEY database. All newly formed compounds were characterised by 1 H NMR and HR-APCI mass spectral data.
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