The volatile flavor components of swill - cooked dirty oil and edible vegetable oil were deter- mined by ion mobility spectrometry rapidly to obtain the spectrograms of volatile flavor components. Com- paring spectrograms, the first - order derivatives of ion mobility spectrogram datas were got and their fea- ture points were extracted, so most edible vegetable oil spectrogram datas could be separated from swill - cooked dirty oil spectrogram datas. After training and identifying with ion mobility spectrogram datas through artificial neural network method, the discerning accuracy of edible veg...
