Electrochemical determination of mepanipyrim using a green-synthesized silver nanoparticle modified multi-walled carbon nanotube electrode
Electrochimica Acta, cilt.577, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 577
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.electacta.2026.149820
- Dergi Adı: Electrochimica Acta
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Electrode, Food chemistry, Green synthesis, Mepanipyrim, Voltammetry
- Gazi Üniversitesi Adresli: Evet
Özet
As an anilinopyrimidine fungicide, mepanipyrim is widely used in agriculture to protect fruits and vegetables from fungal diseases. In this study, a green-synthesized silver nanoparticle-modified multi-walled carbon nanotube paste electrode (AgNP-MWCNPE) was fabricated for the electrochemical determination of mepanipyrim. Waste orange peel extract was used as both a reducing agent and a stabilizer to synthesize AgNPs. The synthesized AgNPs were incorporated into the MWCNPE. The experimental parameters influencing the voltammetric response, including pH, frequency, pulse amplitude, and step potential, were optimized systematically. Under optimum experimental conditions, mepanipyrim produced a well-defined oxidation peak at +1100 mV (vs. Ag/AgCl) and displayed linearity across the concentration range spanning 1.0 × 10–7 –1.0 × 10–4 M. The limit of detection was determined as 0.0319 μM. Negligible interference was observed when testing the sensor with carbofuran, methiocarb, and chlorpyrifos. Its applicability was further demonstrated by analyzing blackberry and pear juice samples. Recovery studies performed at 0.50, 1.00 and 2.00 μM provided recoveries ranging from 94.0% to 98.0% with low relative standard deviations. Based on the electrochemical findings, the mechanism of the electrode reaction was proposed. The developed AgNP-MWCNPE provides a simple, environmentally friendly, and sensitive platform to quantify mepanipyrim in food samples.