Gold Nanoparticle and Poly Arginine Modified GCE for Simultaneous Determination of Hydroquinone and Catechol

Abstract

In this work, a novel electrochemical sensor based on gold nanoparticle AuNP and poly L-arginine P AG modified glassy carbon electrode GCE P AG /AuNP/GCE was designed to determine hydroquinone HQ and catechol CC . Scanning electron microscopy SEM , cyclic voltammetry CV and electrochemical impedance spectroscopy EIS were utilized to characterize the P AG /AuNP/GCE. Differential pulse voltammetry DPV results revealed that the modified GCE represented high selectivity for the simultaneous determination of HQ and CC. The linear working ranges of HQ and CC were in the concentration range of 5.0 to 600.0 μmol L-1 with the detection limits of 1.5 and 1.42 μmol L-1, respectively. The prepared sensor is a suitable tool with low cost for the rapid analysis of HQ and CC in the real samples with high recoveries.

Keywords

• Hydroquinone,catechol,simultaneous,poly arginine,AuNP

Altın Nanopartikül ve Poli arjinin Modifiye Camsı Karbon Elektrot ile Hidrokinon ve Katekolün Eş Zamanlı Tayini

Abstract

B u çalışmada, hidrokinon HQ ve katekolün CC tayini için altın nanopartikül AuNP ve poli L-arjinin P AG modifiye edilmiş camsı karbon elektrot GCE P AG /AuNP/GCE temelli yeni bir elektrokimyasal sensör tasarlandı. Taramalı elektron mikroskobu SEM , dönüşümlü voltametri DV ve elektrokimyasal impedans spektroskopisi EİS P AG /AuNP/GCE’yi karakterize etmek için kullanıldı. Diferansiyel puls voltametrisi sonuçları modifiye elektrodun hidrokinon ve katekolün eş zamanlı tayini için yüksek duyarlılık ve hassasiyet gösterdi. HQ ve CC’nin doğrusal çalışma aralığı 5.0 ile 600.0 µmol L-1 arasında ve gözlenebilme sınırları sırasıyla 1.5 ve 1.42 µmol L-1 olarak bulundu. Hazırlanan sensör hidrokinon ve katekolün gerçek örneklerde hızlı analizi için yüksek geri kazanımla düşük maliyetli uygun bir araç olarak önerildi. Hazırlanan sensör, yüksek geri kazanımlarla gerçek numunelerde HQ ve CC’nin hızlı analizi için düşük maliyetli uygun bir araçtır

Keywords

• Hidrokinon,katekol,eş zamanlı,poly arjinin,AuNP

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