Journal
SEPARATIONS
Volume 8, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/separations8030028
Keywords
trace elements; almonds; pistachios; hazelnuts; walnuts; nuts; digestion; ICP-AES
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Funding
- European Union (European Social Fund-ESF) through the Operational Programme Human Resources Development, Education and Lifelong Learning [MIS-5033021, 2019050-050-3-17749]
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This study analyzed the trace element content of 32 types of nuts in a Greek market using ICP-AES, finding differences in concentration among elements but no significant differences among different nut species.
The trace element content of thirty-two nuts including almonds, walnuts, hazelnuts and pistachios available in a Greek market was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). Wet acid digestion using nitric acid (65%) took place in Teflon autoclaves. The limits of detection (LODs) and limits of quantification (LOQs) ranged between 0.01 (Mg)-2.52 (Cu) mu g g(-1) and 0.02 (Mg)-8.40 (Cu) mu g g(-1), respectively. Good method linearity (r(2) > 0.9990) was observed for each element at the selected emission lines. The metals were quantified and one-way analysis of variance (ANOVA) was used to examine whether or not there were any statistically significant differences among the metal concentrations inside the different nut species.
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