سال انتشار: ۱۳۸۷

محل انتشار: همایش بین المللی ژئولیت ایران

تعداد صفحات: ۸

نویسنده(ها):

Fatemeh Mohamadnia –
reza ojani –
ebrahim ahmadi –
jahanbakhsh raoof –

چکیده:

A carbon paste electrode modified with aminopropyle-grafted mesoporous silica (APS) material was
evaluated as an electrochemical sensor for ferricyanide species in aqueous medium. This solid material was
characterized by Fourier transform infrared (FTIR) spectroscopy. Electrochemical detection was achieved
after protonation of N-bearing groups on APS located at the electrode surface giving positive charge and
accumulation of ferricyanide anion at open circuit. The influence of various experimental parameters (i. e.
pH of the pretreatment, detection and accumulation media, carbon paste composition, accumulation time) on
the sensor response was investigated. The linear analytical curves was obtained in the range of 2×۱۰-۷-۱۰-۵ M
for ferricyanide using DPV method. The detection limit (2σ) was determined 8×۱۰-۸ M. This new sensor was
applied to ferricyanide analysis in electroplating waste.