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Journal of Applied Sciences

Year: 2002 | Volume: 2 | Issue: 3 | Page No.: 405-407
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Research Article

Study of Interference in the Flame Atomic Absorption Spectrometric Determination of Aluminum by Using Factorial Design

M. Mazloum
Department of Chemistry, Kashan University, Kashan, Iran

ABSTRACT

Acid rain (rain with a pH of less than 5.6) is able to leach several metals from sediments and soils, among the metals that pass into ground water and, some times surface water is aluminum, which is believed to be toxic to fish, other aquatic organisms and several plant species. Difficulties is measurement of aluminium by AAS arises from the effect of interferences generally results in relatively high detection limits. This paper deals with the mathematical evaluation of important experimental parameters including concentration, burner height, lamp current and fuel/oxidant ratio influencing the AAS response of aluminium. Factorial design was used to obtain reliable information for the effects of each parameter or their combined influence. The statistical models obtained make it possible to evaluate the weight to any experimental value and obtain an idea for possible analytical application of the systems studied. Results indicates that the most significant input factors affecting absorbtion signal are the instrumental parameters. The effects of lamp current and burner height are positive, but the effect of concentration of anions is negative.
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REFERENCES

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