Simultaneous determination of antimony and bismuth by beta-correction spectrophotometry and an artificial neural network algorithm.

Simultaneous determinations of antimony and bismuth were done by beta-correction spectrophotometry and a feed forward neural network algorithm with back propagation of error. The sensitivity was improved using beta-correction spectrophotometry. The determination of trace amounts of mixtures of Sb and Bi in various matrices (river, tap and industrial wastewater) were investigated by neural network and beta-correction spectrophotometry using the complexes formed between pyrogallol red, Sb and Bi. The results showed that measurement is possible in the ranges of 0.05-5.0 and 0.2-3.2mugml(-1) for Sb(III) and Bi(III), respectively. The results also show very good agreement between true and predicted concentration values and have the ability to use in routine analysis.

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