Abstract
Background: Reliable analytical methods for metals determination in tea is a demand of the nutritional and toxicological sciences. In this work, a constrained mixture design has been applied to develop an efficient closed-vessel microwave-assisted digestion procedure for Ca, Cu, Fe, K, Mg, Mn, Na, Sr and Zn determination in vegetal leaves used for tea preparation. Keywords: Constrained mixture design, final acidity, ICP OES, metal, microwave-assisted digestion, residual carbon, vegetal leaves.
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