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- W1884234015 abstract "Abstract A simple, non-digestion treatment of brews of ground roasted and instant coffees prior to their analysis on the content of Ca, Fe, K, Mg and Na (with flame atomic absorption spectrometry) and Al, Ba, Cd, Co, Cr, Mn, Ni, Pb and Sr (with inductively coupled plasma optical emission spectrometry) was proposed. Three different sample preparation procedures of brews, including acidification with HNO 3 and aqua regia (both at 0.25, 0.50 and 1.0 mol L − 1 ) and direct analysis of untreated beverages, were compared. Under selected conditions, i.e . , using acidification of brews with HNO 3 to 0.25 mol L − 1 , precision (as relative standard deviation) from 0.2 to 8.7% and detection limits between 0.036 (Sr) and 36 (Fe) ng mL − 1 were achieved. Accuracy of the chosen procedure was verified by comparing obtained results with those assessed using open-vessel wet digestion. Eighteen different coffees marketed in Poland were analyzed with the use of the proposed procedure. Concentrations of selected metals (Al, Ca, Co, K, Mg, Mn, Ni) were effectively used to classify brews of analyzed coffees by principal component analysis, factor analysis and hierarchic cluster analysis." @default.
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- W1884234015 date "2016-11-01" @default.
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- W1884234015 title "The evaluation of the suitability of different alternative sample preparation procedures prior to the multi-elemental analysis of brews of ground roasted and instant coffees by FAAS and ICP OES" @default.
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- W1884234015 doi "https://doi.org/10.1016/j.foodres.2015.09.031" @default.
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