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

$NaHSO_4/Na_2SO_4$ (SBS) (pH 2.0) çözeltisi içerisinde amperometrik I-t yöntemi kullanılarak polianilin-poli(3- metiltiyofen)-poli(3,3’-diaminobenzidin) (PANI - 4P_3MT$ - 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.

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 - $P_3$MT - PDAB) coated Pt disc electrode using amperometric I-t method in $NaHSO_4/Na_2SO_4$ (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 pyrocatechol at lower peak potential (0.50 V) than oxidation peak potential (0.62 V) was carried out.

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