INQUISAL   20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
Multielemental analysis in vegetable edible oils by inductively coupled plasma mass spectrometry after solubilisation with tetramethylammonium hydroxide
Autor/es:
MARIANELA SAVIO; MARÍA SOLEDAD ORTIZ; CÉSAR A. ALMEIDA; ROBERTO A. OLSINA; LUIS D. MARTINEZ; RAUL GIL
Revista:
FOOD CHEMISTRY
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 159 p. 433 - 438
ISSN:
0308-8146
Resumen:
Trace metals have negative effects on the oxidative stability of edible oils and they are important because
of possibility for oils characterisation. A single-step procedure for trace elemental analysis of edible oils is
presented. To this aim, a solubilisation with tetramethylammonium hydroxide (TMAH) was assayed prior
to inductively coupled plasma mass spectrometry detection. Small amounts of TMAH were used, resulting
in high elemental concentrations. This method was applied to edible oils commercially available in
Argentine. Elements present in small amounts (Cu, Ge, Mn, Mo, Ni, Sb, Sr, Ti, and V) were determined
in olive, corn, almond and sunflower oils. The limits of detection were between 0.004 lg g1 for Mn
and Sr, and 0.32 lg g1 for Sb. Principal components analysis was used to correlate the content of trace
metals with the type of oils. The two first principal components retained 91.6% of the variability of the
system. This is a relatively simple and safe procedure, and could be an attractive alternative for quality
control, traceability and routine analysis of edible oils.