Abstract
ABSTRACT With the aid of the analytical energy dispersive X-ray fluorescence technique with radioisotope excitation, the concentrations of metals in commercial tablets containing 0.25 mg of digoxin were estimated. Concentrations ranging from 2.99 to 10.70 µg of Fe; 1.59 to 2.30 µg of Ni; 0.94 to 5.48 µg of Cu and 0.11 to 5.72 µg of Zn were found per tablet analyzed. The experimental detection limits for these elements varied from 13.03 to 22.57 µg l−1, while the relative errors made in the quantification of these metals were lower than 15%.
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