Determination of manganese in human teeth by flame atomic absorption spectrometry

الملخص EN

Flame atomic absorption spectrometry was applied to the determination of manganese in the whole human teeth .

Combination of calcium with phosphat 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 (200 μg / 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 (0.126 μg / 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 0.05 μg/ml are possible.