Abstract
We report here, for the first time, a smartphone-based lab-on-paper method for determination of uranium in ores. The method is based on the reaction with arsenazo-III on a filter-paper strip. The intensity of the green color was determined by a smartphone. The calibration curve is linear up to at least 60 μg mL−1 of uranium with LOD and LOQ values of 0.66 and 2.21 μg mL−1, respectively. The proposed method was applied for the analysis of spiked water samples and real Egyptian ore samples with recoveries ranging from 97.3 to 104.7%. The results are in agreement with the reported reference titrimetric method.
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