Direct Determination of Arsenic in Potassium Citrate Tablet Using Graphite Furnace Atomic Absorption Spectrometry
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Abstract
In this study, a rapid and simple method based on graphite furnace atomic absorption spectrometry (GFAAS) is described for direct determination of arsenic in potassium citrate tablet samples. Pyrolytic graphite tubes were used as atomizers. Nickel nitrate was used as chemical modifier. The ashing and atomization temperature and the concentration of modifier were also optimized. The detection limit of the method was 0/8 ng/ml As in potassium citrate tablet samples.The relative standard deviation for ten determination of a spiked sample with concentration of 30 ng/ml As ranged was 2.2 %. The accuracy of the method was confirmed by the analysis of spiked samples. The linear rang of calibration is in the range of 0.8-80 ng/ml of arsenic.
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© 2012, Author(s). This open-access article is available under the Creative Commons Attribution 4.0 (CC BY 4.0) International License (https://creativecommons.org/licenses/by/4.0/), which allows for unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.
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