Voltammetric determination of cysteine at a carbon paste electrode modified with Cu(II)-salen complex

Journal of Physical Chemistry & Eleectrochemistry

مقاله 3، دوره 2، شماره 1، فروردین و اردیبهشت 2014، صفحه 78-81   

نوع مقاله: Research Paper

تاریخ دریافت: 20 مهر 1392،  تاریخ پذیرش: 20 مهر 1392 

چکیده

The electrochemical behavior of a modified carbon paste electrode (MCPE) with N,N′
ethylenbis(salicylideneiminato)copper(II) complex ([Cu(II)-Salen]) was investigated as a new
sensor for cystein. The Britton-Robinson buffer with pH 5, 10% modifier in electrode, potential
scanning rate of 20 mVs-1 and puls height of 50 mV were used as the optimum condition for the
determination of cysteine using carbon paste electrode modified with Cu(II)-Salen complex. Under
these optimum conditions, the resulting electrode demonstrated linear response with cysteine
concentration in the range of 1-10 and 10-80 μM. The effects of potential interfering species were
studied and it was found that only thiocyanate ion interfered in cysteine determination and the
proposed procedure was free from most other interferences.

کلیدواژه‌ها

Modified carbon paste؛ Cu(II)-Salen؛ Voltammetric determination؛ Cysteine