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A methodology based on multivariate analysis of the NIR reflectance spectra was developed for yerba mate classification. All brands of yerba mate analyzed were correctly classified according to the country of origin.

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Low concentrations of U, Hf, and Th were quantified using USN and axial view ICP OES, without matrix separation/analyte preconcentration.

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A microporous membrane fitted to a pneumatic nebulizer–desolvation system was employed for introducing the sample solution into the ICP, reducing the water loading and magnifying the effect of a low flow of N2 in the drier ICP.

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