Two volatiles in Table1 were described as‘‘cooked Jasmine rice’’. One was the well-known 2-acetyl-1-pyrroline (2-AP, popcorn-like) (Buttery et al., 1982) observed at a ZB-5 alkane index (Linear Retention Index, LRI) value of 924. The second cooked rice character impact volatile, 2-acetyl-2-thiazoline (2-AT) was observed at a ZB-5 LRI value of 1112. There was also a sulphur peak (using GC–PFPD) at this identical retention time. Authentic 2-AT also produced a peak at this standardized retention value. Identification of 2-AT was confirmed from the GC–MS TIC chromatographic standard retention value match and further confirmed by matching the mass spectrum from a 2-AT standard with that from the rice sample ( Mahattanatawee & Rouseff, 2008).