Determination of Trace Amount of Cadmium by Modified Graphite Electrode in Aqueous Samples
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JETT-6-3_002
تاریخ نمایه سازی: 6 اسفند 1398
Abstract:
In this study the 2,3- Dihyroquinazolin-4(1H)-one was used successfully as an ionophore in construction of modified graphite electrode for Cd (II) cation measurement in aqueous samples, which was formed from a thin layer by Sol-Gel method. The electrode response to Cd (II) cation was reported with a Nernstian slope of -28.9 mV/decade, dynamic range of 1.0×10-2-1.8×10-8 M and pH range of 5.0-6.5. The electrode response time was 45 sec and its detection limit was recorded as 8.6×10-9 M. The lifetime of electrode was about 40 days. The proposed electrode showed good selectivity for Cd2+ compared to many metal cations. Finally, the desired electrode was satisfactorily used as an indicator electrode in potentiometric titration with EDTA. Also, it was used to determination of Cd2+ in real samples and the results were compared with results of atomic absorption spectrophotometer.
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Authors
M Bagheri
Department of Chemical Engineering, Jami Institute of Technology, Isfahan, Iran