Nitrat ortamında Nitritin Katalitik Etkisinin Asit Kırmızısı-27 Kobalt Kompleksi Üzerine Grafit ve Cıva Elektrot ile Voltammetrik Araştırılması

Bu çalışmada günümüzde çok önemli azo boyar maddelerden biri olan asit kırmızısı 27’nin kobalt kompleksi üzerine nitritin katalitik etkisi nitrat ortamında incelenmiştir. Voltammetrik çalışmalar asılı cıva damla elektrodu ve kalem grafit elektrot (KGE) ile Katodik Adsorptif Kare Dalga Voltammetri (KAdsKDV) tekniğiyle gerçekleştirilmiştir. Öncelikle asit kırmızısı 27 ile kobalt iyonu kompleksi oluşumu elektrokimyasal metod ile belirlenmiştir. Bundan sonra kompleksin voltammetrik pik akımının nitrit anyonlarının varlığında arttığı gözlenmiştir. Her iki elektrotta koşulların optimize edilmesi için biriktirme süresi, potansiyeli ve nitrit konsantrasyonu araştırılmıştır. Elde edilen sonuçlara göre nitritin katalitik etkisinin reaksiyon mekanizması her iki elektrot için önerilmiştir.

Voltammetric Determination of Catalytic Effect of Nitrite in Nitrate Media by Graphite and Mercury Electrode on Acid Red-27 Cobalt Complex

In this study, the catalytic effect of nitrite on the cobalt complex of acid red 27, which is one of the most important azo dyes today, was investigated. Voltammetric studies were carried out with a Hanging mercury drop electrode (HMDE) and pencil graphite electrode (PGE) using the Cathodic Adsorptive Square Wave Voltammetry (CAdsSWV) technique in nitrate media. First, in situ formation of the complex was determined by electrochemical method. It was then observed that the voltammetric peak current of the complex increased in the presence of nitrite anions. The deposition time, potential and nitrite concentration were investigated to optimize the conditions for both electrodes. According to the results, the reaction mechanism of the catalytic effect of nitrite has been proposed.

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