Analysis of olive and hazelnut oil mixtures by high-performance Liquid chromatography-atmospheric pressure chemical ionisation mass spectrometry of triacylglycerols and gas-liquid chromatography of non-saponifiable compounds(tocopherols and sterols)
J. Parcerisa et al., Analysis of olive and hazelnut oil mixtures by high-performance Liquid chromatography-atmospheric pressure chemical ionisation mass spectrometry of triacylglycerols and gas-liquid chromatography of non-saponifiable compounds(tocopherols and sterols), J CHROMAT A, 881(1-2), 2000, pp. 149-158
We analysed the triacylglycerol, tocopherol and sterol composition of hazel
nut oil, olive oil and their mixtures (90% olive oil with 10% hazelnut oil,
70% olive with 30% hazelnut oil and 50% olive oil with 50% hazelnut oil).
The main triacylglycerols were 1,2,3-trioleylglycerol, 2,3-dioleyl-1-palmit
oylglycerol, 2,3-dioleyl-1-linoleylglycerol and 2,3-dioleyl-1-stearoylglyce
rol. Non-saponfiable compounds (tocopherols and sterols) were derivatised a
s O-trimethylsilyl ethers. alpha-Tocopherol was the main vitamin E isomer i
n all samples; however, small amounts of beta-tocopherol and gamma-tocopher
ol were also found, beta-Sitosterol and Delta(5)-avenasterol were the princ
ipal sterols in all samples; campesterol and stigmasterol were minor sterol
compounds in all samples. Obtusifoliol, which was a major sterol in olive
oil and oil mixtures, was not found in hazelnut oil. The discriminant analy
sis showed that hazelnut oil, olive oil and oil mixtures were clearly separ
ated according to their triacylglycerol composition. (C) 2000 Elsevier Scie
nce B.V. All rights reserved.