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The inductively coupled plasma optical emission spectrometry (ICP-OES) is recognized as a robust method for the determination of different elements in liquid and solid samples. However, for metals determinations from solid samples, digestion is required in order to dissolve the analytes into liquid solution. It was the aim of this paper to validate the ICP-OES method for determination of metals from zeolite samples after acid digestion. The suitability of three digestion procedures using wet digestion with mineral...