Voltammetric Determination of Cd(II) Using Modified Solid Electrode Surface Based Nanoparticle and Calix[4]arene

Abstract

Heavy metal pollution has become a serious threat for human health, living resources and ecological systems. Therefore, the determination of heavy metal concentrations is important. In this study; metal sensor based nanoparticles was prepared to determine heavy metal ions. For this purpose, solid surface electrodes were prepared using the new synthesized calixarene functionalized multiwalled carbon nanotube as nanopartule and developed a new method to determine metal on prepared surface.

To determine the performance of the prepared CNT-Calix-Cra/GCE electrode, SWASV (square wave anodic stripping voltammetry) voltamogramme calibration graphs were obtained using certain range of standards.  When the sensitivity and operating range of the modified electrode examined it was observed that a higher Cd(II) sensitivity. The optimum pH, Calix [4] arene immobilized multi-walled carbon nanotube quantity, buffer concentration and work potential for the modified electrode, respectively; pH-5,5µL, 0.1 M and  -1.3 V were found. Deposition time 120 s and linear operating range 3,23.10^-7 - 4,81.10^-5molL^-1 for CNT-Calix-Cra/GCE and correlation coefficient was recorded as 0,9905.

Keywords

• Square wave anodic stripping voltammetry,Calixarene,MWCNT,Modified electrode,Sensor

Kaliks[4]aren Nanopartikül Bazlı Modifiye Katı Elektrot Yüzeyleri Kullanılarak Cd(II) nin Voltametrik Tayini

Abstract

Ağır metal kirliliği insan sağlığı, canlı kaynaklara ve ekolojik sistemleri için ciddi bir tehdit haline gelmiştir. Bu nedenle ağır metallerin tayini oldukça önemlidir. Bu çalışmada; ağır metal iyonlarının kolayca tayin edilebilmesi için, nanopartikül temelli metal sensör hazırlanmıştır. Nanopartikül olarak yeni sentezlenen kaliksarenlefonksiyonlandırılmış çok duvarlı karbon nanotüp kullanılarak katı yüzey elektrotlar hazırlanmış, hazırlanan yüzeylerde metal tayinin yapılabilmesi için yeni bir yöntem geliştirilmiştir.

Hazırlanan CNT-Calix-Cra/GCE elektrodun çalışmada analizi yapılması istenilen Cd(II) iyonuna karşı performansını belirlemek için belli aralıkta hazırlanan standart Cd(II) iyonuna karşı SWASV( kare dalda anodik sıyırma) voltammogram grafikleri elde edilmiştir. Duyarlılıkları ve çalışma aralıkları incelendiğinde modifiye edilmiş olan elektrodun Cd(II) duyarlılığının daha yüksek olduğu gözlemlenmiştir. Modifiye elektrot için optimumpH, kaliks[4]arenimmobilize çok duvarlı karbon nanotüp miktarı, tampon derişimi ve çalışma potansiyeli sırasıyla; pH-5,5µL, 0,1 M ve -1,3 V olarak bulunmuştur. Modifiyeelektrodun biriktirme süresi 120 s ve CNT-Calix-Cra/GCE için doğrusal çalışma aralığı 3,23.10^-7 - 4,81.10^-5 molL^-1ve korelasyon sabiti 0,9905 olarak kaydedilmiştir.

Keywords

• Kare dalga anodik sıyırma voltametrisi,Kaliksaren,MWCNT,Modifiye elektrot,Sensör

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