(1) Department of Chemistry, Faculty of Science, Kashan University, Kashan, Iran
Abstract:
A new electrode based on a complex of chromate ions with bis(acetylacetonato) cadmium(II) as a carrier was developed for detection of chromate in aqueous solution. The electrode exhibited linear response with Nernstian slopes of –28.8±0.5mVper decade for chromate within the concentration range of 2.5×10–6–0.1M. The limit of detection as determined from the intersection of the extrapolated linear segments of the calibration plots was almost 1.0×10–6M. The electrodes exhibited good selectivities for chromate. The response time of the electrode was <25s over the entire concentration range. The electrode can be used in the pH range 8.0–12.0 for chromate. It was used as an indicator electrode in titration with Pb(NO3)2 and for the determination of chromate ion in wastewater samples.
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