Polianilin-Poli 3-metiltiyofen -Poli 3,3’-diaminobenzidin Filmi ile Modifiye Edilmiş Pt Elektrot ile Nehir Suyunda Pirokatekolün Elektroanalizi

N aHSO4/Na2SO4 SBS pH 2.0 çözeltisi içerisinde amperometrik I-t yöntemi kullanılarak polianilin-poli 3metiltiyofen -poli 3,3’-diaminobenzidin PANI - P3MT - PDAB kaplı Pt disk elektrot üzerinden pirokatekol tayini başarılı bir şekilde gerçekleştirildi. 0,45 V–0,65 V aralığında potansiyel değerleri uygulandı ve 0.50 V optimum potansiyel olarak belirlendi. Analitik parametreler gözlenebilme sınırı, alt tayin sınırı ve doğrusal çalışma aralığı sırasıyla 7.37×10-5, 2.47×10-4 ve 2.47×10-4-25.0 mmol.L-1 olarak bulundu. Ayrıca, matriks girişimini ve geliştirilen yöntemin doğruluğunu test etmek için, pirokatekol derişimi 5.0 ve 10.0 mmol.L-1 olacak şekilde yapay olarak kirletilmiş nehir sularında pirokatakol tayini gerçekleştirildi. Geri kazanım değerleri sırasıyla % 101.1 ve % 101.2, olarak elde edildi. Pirokatekolün yükseltgenme potansiyelinden 0.62 V daha düşük potansiyelde 0.50 V matriks etkisi olmaksızın pirokatakol tayini gerçekleştirildi

Anahtar Kelimeler:

Polianilin, pirokatekol, poli 3-metiltiyofen, poli 3, 3’-diaminobenzidin

Electroanalysis of Pyrocatechol in River Water Over Pt Electrode Modified with Polyaniline-Poly 3-methylthiophene - Poly 3,3’-diaminobenzidine Film

Determination of pyrocatechol was successfully achieved over polyaniline - poly 3-methylthiophene - poly 3,3’-diaminobenzidine PANI - P3MT - PDAB coated Pt disc electrode using amperometric I-t method in NaHSO4/Na2SO4 SBS pH 2.0 solution. The potential range of 0.45 V-0.65 V were implemented and a potential of 0.50 V was found to be an optimum potential. Analytical parameters LOD, LOQ and linear range were 7.37×10-5, 2.47×10-4 and 2.47×10-4-25.0 mmol.L-1, respectively. Furthermore, assay of pyrocatechol was performed in artificially contaminated river water samples over modified electrode at the pyrocatechol concentrations of 5.0 and 10.0 mmol.L-1 to check on the matrices interference and accuracy of the developed method. Recovery values were 101.1% and 101.2%, respectively. Without matrix effect, determination of pyro- catechol at lower peak potential 0.50 V than oxidation peak potential 0.62 V was carried out.

Keywords:

Polyaniline, pyrocatechol, poly 3-methylthiophene, poly 3, 3’-diaminobenzidine,

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