Characterization of interfering effects in the determination of molybdenum by atomic absorption spectrometry |
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| Authors: | A.M. Abdallah M.M. El-Defrawy M.A. Mostafa A.B. Sakla |
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| Affiliation: | Department of Chemistry, Faculty of Science, University of Mansoura Egypt;Microanalytical Center, Faculty of Science, University of Cairo, Dokki, Giza Egypt |
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| Abstract: | The effect of anions on molybdenum absorbance depends on the pH; low pH causes the formation of iso- or heteropoly anions which change the atomization process in the flame. Organic ligands also depress the release of molybdenum atoms but cyanide radicals in the flame scavenge, e.g., OH radicals from such ligands and prevent their depressive effect. Certain cations (La, Ce, Mg, Ca, Sr and Ba) appear to form spinels; boric acid minimizes this effect. |
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