| مستخلص: |
The proton NMR spectra of apple vinegar samples obtained from the farms of Kurdistan region-Iraq, have been thoroughly examined and reported. Many organic molecules from various classes were assigned, including organic acids, alcohols, volatile compounds, and amino acids. Without extraction or pre-concentration processes, the possibility of quantifying the compounds that were present in the whole vinegar sample was also investigated. The results showed that ¹H NMR with water suppression allows a quick simultaneous determination of acetic, formic, lactic, malic, succinic, tartaric acids, ethanol, methanol, acetoin, 2,3-butanediol, glucose and fructose, by using dimethyl sulfone (DMSO2) or potassium hydrogen phthalate (KHP) as internal standards. The ¹H NMR method was applied to differentiation of the various samples of apple vinegar. [ABSTRACT FROM AUTHOR] |
