Abstract
A flow-injection procedure is proposed for the determination of molybdenum in steels based on the thiocyanate method. Effects of iron(III), acidity, reagent concentration and interfering species were investigated by using flow-injection systems with the merging zones approach which reduced drastically the number of standard solutions to be prepared. Full details of system design are given. The procedure can be applied to several types of steel samples of industrial relevance. After dissolution of the steels in aqua regia, molybdenum can be determined in the range 0.10–4.00% (w/w) at a rate of up to 270 samples per hour with relative standard deviations less than 2%. The results agree with those obtained by atomic absorption spectrometry with the standard addition method and by plasma atomic emission spectrometry, and with certified values of standard reference samples.
Published Version
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