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andrewtom627

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The room temperature ionic liquid trihexyl(tetradecyl)phosphonium
decanoate ([TETDP]+[decanoate]− was synthesized,
purified and kindly provided by the Laboratory of
Organic Chemistry, Dep. of Environmental Science, University
of Venice. The ionic liquid trihexyl (tetradecyl) phosphoniumbis (trifluoromethylsulfonyl)imide
([TETDP]+[imide]−,
was obtained from Merck (high purity grade¡Ý99%) and used
as supplied by the manufacturer. In the latter case, according
to the commercial label, the water content was lower than
100 ppm. To avoid any further contamination with water, the
RTILs were kept in a dry box until use.
The vegetable oils examined in this study were a maize
oil sample from an Italian commercial brand, and 15
extravirgin olive oils coming from different Italian and
Spanish regions. The olive oil samples were of Protected
Designation of Origin (PDO) and/or directly sampled in oil
mills, so that geographical origin and cultivar of the olives
were guaranteed. All the olive oils came from the same
harvest (2006¨C07) and were sampled in the same period,
shortly subsequent the production. Furthermore, after sampling,
they were stored at room temperature under dark in
amber bottles, and then processed under identical conditions.
In the voltammetric experiments, when necessary, pure
nitrogen (99.99%) supplied by SIAD (Bergamo, Italy) was
used to remove oxygen from the test solutions.

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