外食用油多元素分析.pdfVIP

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外食用油多元素分析

Food Chemistry 159 (2014) 433–438 Contents lists available at ScienceDirect Food Chemistry journal homepage: www.elsevier .com/locate/foodchem Analytical Methods Multielemental analysis in vegetable edible oils by inductively coupled plasma mass spectrometry after solubilisation with tetramethylammonium hydroxide Marianela Savio, María S. Ortiz, César A. Almeida, Roberto A. Olsina, Luis D. Martinez, Raúl A. Gil ⇑ Instituto de Química de San Luis (CCT-San Luis), Área de Química Analítica, Facultad de Química Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, D5700BWQ San Luis, Argentina a r t i c l e i n f o a b s t r a c t Article history: Trace metals have negative effects on the oxidative stability of edible oils and they are important because Received 23 August 2013 of possibility for oils characterisation. A single-step procedure for trace elemental analysis of edible oils is Received in revised form 20 February 2014 presented. To this aim, a solubilisation with tetramethylammonium hydroxide (TMAH) was assayed prior Accepted 9 March 2014 to inductively coupled plasma mass spectrometry detection. Small amounts of TMAH were used, result- Available online 19 March 2014 ing 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 Keywords:

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