It was found that water extracts of different olive samples
show different amounts of magnesium. Fractionation steps
of olive–water extracts were as follows using the analytical
conditions, given in Table 4. Filtration with a 0.45m glass
fibre prefilter (non-cellulosic filter) for the separation of particulate
magnesium was used. A cation exchange resin and
adsorption resin were used for the determination of cationic
and organically bound magnesium, respectively. Although a
magnesium ion selective electrode (Mg-ISE) has also been
used for determination of cationic magnesium (Mg2+), it