| The volatile compounds in cold-pressed sunflower seed oil and hot-pressed sunflower seed oils from sunflower seeds cooked at different temperatures were analyzed by headspace solid phase micro-extraction-gas chromatography-mass spectrometry(HS-SPME-GC-MS). The results showed that 59 volatile compounds were detected in sunflower seed oils samples, which mainly were terpenes, ketones and aldehydes, alkanes, heterocyclic and carboxylic acids. Terpenes, alkanes and ketones and aldehydes were the main volatile compounds in cold-pressed sunflower seed oil, and their contents were 38.96%, 16.19% and 12.20% respectively; the kinds of volatile compounds in hot-pressed sunflower seed oils from sunflower seeds cooked at 110, 130℃ and 150℃ were similar to that in cold-pressed sunflower seed oil, while the contents were very different; the main volatile compounds in hot-pressed sunflower seed oils from sunflower seeds cooked at 170 ℃ and 190℃ were pyrazines, aldehydes and ketones. |
