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Abstract
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Abstract
The health effects of olive oil have attracted
the attention of people for ages. Our contry
has a very high level of olive and olive oil
production and export. Olive oil (Olivea
oleum) is a greenish/yellowish, transparent
and aromatic liquid obtained without
undergoing any chemical treatment after
squeezing together with the pit of the olive. The
international olive oil council classifies refined
olive oil, extra virgin olive oil, and pomace
olive oil. Therefore, the aim of the present
study was to analyze and evaluate the extra
virgin olive oils sold in Istanbul according to
the Turkish Standard (TS) 894 and TS 341.
With this purpose, the determination of colorappearance, free fatty acidity (in oleic acid),
number of saponification, iodine index,
refractive index, density, mineral oil, number
of peroxide, humidity and amount of volatile
matter were performed. In this study, 26
different olive oil samples were analyzed. Free
fatty acidity of 24 samples (92%) was found
suitable to the standard, whereas the number
of peroxide and mineral oil values of samples
were compatible with the standard. The iodine
number and density values of only 21 samples
(80%) were conformed to the standard. Twenty
olive oils (77%) were found to be suitable for he refractive index. The number of
saponification is appropriate in 17 samples
(65%), while the humidity value of 23 olive oils
(88%) aresuitable to the standart. As a result,
only 11 olive oils (42%) were compatible with
the standard. In conclusion, the event that the
olive oils sold in the market violate the
Standard, the consumer is deceived and
expected health benefits are also decreasing.
Within the present study, it was noted that
there are olive oils and also mixed olive oils in
the market. The fact that the price of olive oil
is higher than other oils which increases
counterfeiting and adulteration in this regard.
Liquid oils prepared by these methods are
bought by consumers and economic losses
occur. Food control and inspections must be
effective and continuous by the authorities to
protect human health.