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Analytical and Bioanalytical Electrochemistry، جلد ۱۶، شماره ۱۲، صفحات ۱۰۹۸-۱۱۰۸
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عنوان انگلیسی A New Sensor Electrode for Caffeine Determination Using Square Wave Voltammetry: Cytosine Modified Glassy Carbon Electrode
چکیده انگلیسی مقاله In this study, cytosine (CT) modified glassy carbon (GC) electrode was used to investigate the detectability of caffeine (CAF) found in foods such as tea, coffee and soft drinks. Using the cyclic voltammetry (CV) technique, 1 mM CT was prepared in pH 7.2 phosphate buffer solution (PBS) and modified at a scanning rate of 100 mV s-¹ in the potential range of 1.0 V to 2.1 V. CT/GC electrode w:as char:acterized by CV, scanning electron microscope (SEM) and electrochemical impedance spectroscopy (EIS) techniques. 1 mM CAF solutions were prepared in different supporting electrolytes such as H₂SO₄, HCl, HNO₃, and CH₃COOH within the potential range of +0.5 V to +1.7 V using square wave voltammetry (SWV) technique. Effect of the supporting electrolyte concentrations were investigated. CAF solutions in the concentration ranges of 0.75 to 0.05 mM and 0.025 to 0.0025 mM were prepared in 100 mM H₂SO₄ supporting electrolyte and calibration graphs were drawn. Line equations were created using the values ​​read from the drawn graphs. Correlation coefficient (R2) values ​​were calculated as 0.9947 and 0.9961, respectively. Using the calibration curves, limit of detection (LOD) and limit of quantification (LOQ) were found as 0.93 µM and 2.79 µM.
کلیدواژه‌های انگلیسی مقاله Cytosine,Caffeine,Glassy carbon electrode,Cyclic voltammetry,square wave voltammetry
نویسندگان مقاله Şeyma Korkmaz |
Necmettin Erbakan University, Institute of Science, Chemistry Department, Konya, Turkey

Aysel Alovset Rustemova |
Necmettin Erbakan University, Institute of Science, Chemistry Department, Konya, Turkey

Shabnam Jamaladdin Aliyeva |
Necmettin Erbakan University, Institute of Science, Chemistry Department, Konya, Turkey

Hafizullah Sharifi |
Necmettin Erbakan University, Institute of Science, Chemistry Department, Konya, Turkey

İbrahim Ender Mülazımoğlu |
Necmettin Erbakan University, Ahmet Keleşoğlu Education Faculty, Chemistry Department, Konya, Turkey

Ayşen Demir Mülazımoğlu |
Necmettin Erbakan University, Ahmet Keleşoğlu Education Faculty, Chemistry Department, Konya, Turkey

نشانی اینترنتی https://www.abechem.com/article_719413_7f714d5cc3ebd596ebf2409e18701400.pdf
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