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Determination of manganese in human teeth by flame atomic absorption spectrometry | ||
| basrah journal of science | ||
| Article 1, Volume 25, Issue 1, 2007, Pages 67-79 PDF (0 K) | ||
| Authors | ||
| N. A.N.Awad; H.T. Abdulsahib; and A. A.Abdullah | ||
| Abstract | ||
| Flame atomic absorption spectrometry was applied to the determination of manganese in the whole human teeth .Combination of calcium with phosphate may cause low results in the determination of manganese by atomic absorption spectroscopy .Maximum depression of manganese absorbance is noted at mole ratio of phosphate to calcium of (3:1),correct values are obtained by incorporating (2000µg/ml) lanthanum chloride in the solution .Human teeth samples are digested with a mixture (3:1)of conc. nitric and perchloric acids. Blank absorbance value (nitric and perchloric acid mixture )should be checked from time to time .The absolute sensitivity of the method (0.126µg/ml of manganese )permits the determination of manganese in tooth material at microgram per gram concentration levels with precision of 3.8 percent. Detection limit are found to be (0.078 µg /ml of manganese ).Rapid determinations of manganese at concentration down to 0.05µg/ml are possible. | ||
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