Dergiler / Turkish Journal of Pharmaceutical Sciences / 2019 / Cilt: 16 - Sayı: 4

Investigation of the Voltammetric Behavior of Methyldopa at a Poly (p-Aminobenzene Sulfonic Acid) Modified Sensor

Poli (p-Aminobenzen Sülfonik Asit) Modifiye Sensör ile Metildopanın Voltametrik Davranışının İncelenmesi

Sayfa
450–456
DOI
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The modified sensor was used for the simultaneous determination of interferingsubstances such as MD and ascorbic acid in real samples.Conclusion: The obtained results revealed that the prepared modified electrode and the proposed method have good sensitivity, repeatability,reproducibility, and stability.

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Amaç & Hipotez:Objectives: The aim was to modify carbon electrodes with (p-aminobenzene sulfonic acid) and use them as a sensor for sensitive and reliabledetection of methyldopa (MD) and ascorbic acid.Materials and Methods: Electropolymerization was performed by cyclic voltammetry in 0.1 M KCl solution.
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Temel Bulgular & Veri:The modified sensor has a highelectrocatalytic effect for oxidation of MD, which appeared in the pH range of 2-11 by differential pulse voltammetry (DPV) techniques.Results: For the voltammetric determination of MD, the best results were acquired by DPV in phosphate buffer solution (PBS) (pH 3).
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Sonuç & Katkı:The modified sensor was used for the simultaneous determination of interferingsubstances such as MD and ascorbic acid in real samples.Conclusion: The obtained results revealed that the prepared modified electrode and the proposed method have good sensitivity, repeatability,reproducibility, and stability.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Alan Parametreleri

Özet

Objectives: The aim was to modify carbon electrodes with (p-aminobenzene sulfonic acid) and use them as a sensor for sensitive and reliabledetection of methyldopa (MD) and ascorbic acid.Materials and Methods: Electropolymerization was performed by cyclic voltammetry in 0.1 M KCl solution. The modified sensor has a highelectrocatalytic effect for oxidation of MD, which appeared in the pH range of 2-11 by differential pulse voltammetry (DPV) techniques.Results: For the voltammetric determination of MD, the best results were acquired by DPV in phosphate buffer solution (PBS) (pH 3). The calibrationplot of the proposed sensor is linear in two concentration ranges of 1.0-30 and 30.0-300.0 μM. The calibration equations over these ranges areIpa (μA)=1.21×C (μM)+30.81, R2=0.994 and Ipa (μA)=0.53×C (μM)+53.30, R2=0.9975, respectively. In the sensitivity studies, the limit of quantificationand the limit of detection were 10.6 nM and 5.0 nM, respectively. The modified sensor was used for the simultaneous determination of interferingsubstances such as MD and ascorbic acid in real samples.Conclusion: The obtained results revealed that the prepared modified electrode and the proposed method have good sensitivity, repeatability,reproducibility, and stability.

Abstract

Amaç: Karbon elektrotların poli (p-aminobenzen sülfonik asit) ile modifikasyonu ve metildopa (MD) ve askorbik asitin hassas ve güvenilir bir şekilde tayini için bir sensör olarak kullanılması. Gereç ve Yöntemler: Elektropolimerizasyon, 0.1 M KCl çözeltisi içerisinde dönüşümlü voltametri (CV) ile gerçekleştirildi. Modifiye edilmiş sensör metildopanın oksidasyonu için yüksek elektrokatalitik etkiye sahiptir, bu da 2-12 pH aralığında diferansiyel puls voltametri tekniği ile gözlenmiştir. Bulgular: MD’nin voltametrik tayini için, en iyi sonuçlar fosfat tampon çözeltisinde (PBS) (pH 3) DPV tekniği ile elde edildi. Bu aralıklarda kalibrasyon denklemi sırasıyla: I pa (μA)=1,21×C (μM)+30,81, R2 =0,994 ve I pa (μA)=0,53xC(μM)+53,30, R2 =0,9975. Duyarlılık çalışmalarında, kantitatif tayin sınırı (LOQ) ve en küçük tayin sınırı sırasıyla 10,6 nM ve 5,0 nM’diır. Duyarlılık çalışmalarında, tayin alt sınırı ve tayin sınırı sırasıyla 10.6 nM ve 5.0 nM idi. Modifiye edilmiş sensör, MD ile askorbik asit gibi girişim yapan maddelerin gerçek örneklerde eş zamanlı tayini için kullanıldı. Sonuç: Elde edilen sonuçlar, modifiye edilmiş elektrot ve önerilen yöntemin iyi duyarlılık, tekrarlanabilirlik, tekrar üretilebilirlik ve kararlılığa sahip olduğunu ortaya çıkardı.

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Bu Makaleye Atıf Yap

ERDOĞDU, G., YAĞCI, Ş. Z., SAVAN, E. K. (2019). Investigation of the Voltammetric Behavior of Methyldopa at a Poly (p-Aminobenzene Sulfonic Acid) Modified Sensor. Turkish Journal of Pharmaceutical Sciences, Cilt: 16 - Sayı: 4, 450–456. https://ajindex.com/articles/403638

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