Determination of Some Metallic Elements and their Effect on Physical Properties of Edible Olive Oil in Palestine
Sun, 2015-08-23 13:06 — Prof. Issam Rashid Ashqer
Abstract:
The
physical properties such as: density, refractive index, viscosity, and
acidity of samples of olive oil from different geographical locations
and heights in Palestine were measured. The measured physical properties
are in agreement with the international and local assigned value. The
concentration of Al, Cd, Cu, Fe, K, Mg, Mn, Na, Ni, Pb and Zn elements
in olive oil samples are measured by inductively coupled plasma mass
spectrometry ICP-MS. It was found that Magnesium (Mg) is the most
concentrated metal detected (294.7-783.0μg/g), followed by concentration
of sodium (Na) (73.4-390.7μg/g) and potassium (K) (23.1 -168.9μg/g).
Concentrations
of iron, copper and lead in Palestinian olive oil don’t agree with
concentration of International Olive Council (IOC). The differences in
concentration in metals of olive oil depend on several factors among the
type of olive tree, storage age, height and geographical location.
There is a positive relation between the concentration of metals in
olive oil and physical properties as density, refractive index,
viscosity, and acidity.
The
daily intake rate of these metals shows no risk to human health
according to US Environmental Protection Agency (EPA) report.
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