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A simpler, and faster than wet digestion, sample treatment was proposed prior to determination of total concentrations for selected macro- (Ca, Mg) and microelements (Fe, Mn) in soluble coffees by flame atomic absorption spectrometry. Samples were dissolved in water and acidified with HNO 3 . Precision was in the range 1–4% and accuracy was better than 2.5%. The method was used in analysis...
A direct analysis of instant coffee brews with HR-CS-FAAS spectrometry to determine the total Ca, Fe, Mg and Mn content has been developed and validated. The proposed method is simple and fast; it delivers good analytical performance; its accuracy being within −3% to 3%, its precision – 2–3% and detection limits – 0.03, 0.04, 0.004 and 0.01mgl−1 for Ca, Fe, Mg and Mn, respectively. In addition, Ca,...
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