Determination of Na and K in Brazilian solid dietary sweeteners by flame photometry
2016
Oliveira, A. P. | Martins, D. L. | Martins, M. L. | Villa, R. D
The aim of this work was to develop a method for the determination of Na and K in Brazilian solid dietary sweeteners by flame photometry. Five types of sweeteners were employed, and the samples were prepared by dissolution in deionized water. The analytical curves showed linear correlation coefficients (r) higher than 0.99. The detection limit (LD) and quantification (LQ) were 0.13 and 0.40 mg L-1, and 0.18 and 0.55 mg L-1, for Na and K, respectively. The LQ valueswere low enough for the quantification of Na and K at concentrations down to 0.1 mg g-1. Recoveries ranged from 79 to 119%, with RSD lower than 8%. The Na and K concentrations measured in the commercial products depended on the types of artificial sweeteners used in theformulations. The proposed method offers a straightforward, rapid, and inexpensive alternative for the determination of Na and K in solid dietary sweeteners.
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