A systematic procedure to enhance reproducibility of SWASV cycles in the determination of toxic metals in real samples (original) (raw)
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Ind Eng Chem Res, 1999
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2012
4 Abstract: In this research, an orthogonal array design (OAD), OA9 was exploited as a chemometric experimental method for the cleaning of chromium surfaces contamination by using an electrochemical cleaner solution that is established upon the redox reaction principle. The influence of cleaning procedure on the removal of lead fouling layer has been investigated by means of SEM/EDAX and ICP analysis. In order to estimate of the main effect of some experimental parameters, we examined the procedure with a statistical method and the results were quantitavely evaluated by the analysis of variance (ANOVA). The OAD estimation of experimental result provides optimized amount of the parameters including, H O 10% (V/V), stirring speed of the mixture 75 rpm 22 and temperature 28°C, to achieve the most cleaned sample, at which the total removal time of 3 g fouling lead layer is predicted only 7 minutes. The prediction has a complete conformity with experimental result achieve at the similar ...