Simultaneous detection of L-cysteine and tryptophan as two importantamino acids using a MgO nanostructure-based electrochemical sensor

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 326

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شناسه ملی سند علمی:

IRANCC20_001

تاریخ نمایه سازی: 28 اردیبهشت 1398

چکیده مقاله:

Modified electro-analytical sensors showed many advantages for the analysis offood, drug, and biological and environmental electro-active compounds [1]. Theapplication of electro-catalytic mechanism to electrochemical analysis sensors canbe increased the selectivity of system [2]. In this work, the synergic effect of MgOnanoparticle (MgO-NPs) and acetylferrocene (AFc) was studied for modification ofcarbon paste electrode (CPE) as a highly sensitive electrochemical sensor forelectro-catalytic determination of L-cysteine in the aqueous solution. A calibrationcurve showed a linear relation in the range of 0.1-700.0 μM. The detection limit 30.0nM was obtained for analysis of L-cysteine at a surface of AF/MgO-NPs/CPE. Figure1 showed differential pulse voltammograms of L-cysteine in the presence oftryptophan with different concentration of two amino acids.The AF/MgO-NPs/CPEshowed two separated oxidation signals with ΔE~170 mV in the solution containingL-cysteine and tryptophan that was sufficient for simulation determination of theseamino acids. The modified electrode was successfully used for the determination ofL- cysteine in real samples.

نویسندگان

Zahra Shamsadin Azad

Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran

Mohammad Ali Taher

Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran

Somaye Cheraghi

Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman, Iran