Both are quick and non-destructive methods that can give you accurate results. You can also check out tips on chemistry and resources on inospin.com for more information. Good luck with your analysis!
Hexane is commonly used for hydrocarbon analysis, but it may not be suitable for analyzing veggie oils. As for fast and simple analysis methods, have you considered using Infrared Spectroscopy (FTIR) or Raman Spectroscopy?