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All Journal Jurnal Periodic Jurusan Kimia UNP Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Pelita Eksakta Hydrogen: Jurnal Kependidikan Kimia SAINTI: Majalah Ilmiah Teknologi Industri Jurnal Pendidikan MIPA
Nizar, Umar Kalmar
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Other

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Voltammetric Detection of Zn2+ Ions Using a Glassy Carbon Electrode Modified with Napa-Soil-Derived NiAl2O4 Septiani, Dhea; Mawardi; Nizar, Umar Kalmar; Suryani, Okta
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.20367

Abstract

This study reports the development of a glassy carbon electrode (GCE) modified with NiAl2O4 derived from napa soil for the voltammetric detection of Zn2+ ions. The modified electrode was prepared using a drop-casting method and characterized in 4.0 mM K3[Fe(CN)6] with 0.1 M KCl as the supporting electrolyte. The results showed an increase in oxidation peak current from 19.93 µA (bare GCE) to 26.80 µA and reduction peak current from −19.03 µA to −24.29 µA after modification, indicating enhanced electron transfer. Zn2+ detection was carried out in the concentration range of 1–3 mM, where the reduction peak current increased from −85.49 µA to −170.83 µA with increasing concentration. A linear relationship between concentration and current response was obtained with a regression equation of y = -42.67x – 40.42 and a correlation coefficient (R2 = 0.9907), indicating good linearity of the sensor. The limit of detection (LOD) was calculated to be 0.21 mM. Among the tested supporting electrolytes, 0.1 M KCl provided the highest and most stable current response. Although the modified electrode shows improved performance, the detection range is still limited to the millimolar level, and further studies are required to evaluate selectivity, reproducibility, and applicability in real samples. These findings demonstrate the potential of napa-soil-derived NiAl2O4 as a sustainable and cost-effective material for electrochemical sensing applications.
Co-Authors Afrilia, Yoni Agustin, Andre Aini, Syamsi Althof, Hasnah Sausan Andrean, Maifil Dwi Anjelia, Mariza Auzakiyah, Sabella Azzahra, Wenalda Hanifah Baehaqi Budhi Oktavia Charles Banon Danish, Mohammed Della Rosalynna Stiadi Deski Beri Desy Kurniawati Edi Nasra Ellizar ellizar Fadhila, Radhiatul Fadila, Radhiatul Fika, Miva Hemalia Fitri Amelia Fitriani Fitriani Gusvita, Nola Hamid, Hairul Amani Abdul Hanafi, Muhammad Farhan Handri, Silvi Hapzi Ali Hardeli Hardeli Hary Sanjaya Ibrahim, Siti Fatimah Indang Dewata Ismail, Mohammad Luqman Istiqamah, Siti Sarah Izanel, Rezi Ananta Karmila, Aroma Karsa, Dion Randi Khaliq, Feni Kurnia Lubis, Amalia Putri Mawardi Miftahul Jannah Miftahul Khair Miftahurrahmi, Miftahurrahmi Minda Azhar Muhammad Farhan Mukhaiyar, Riki Novel, Dheo Shalsabilla Novela, Riana Novriansyah, Edo Pernadi, Niza Lian Putra, Ananda Putri, Natasya Alya Putri, Yunisa Anugrah R, Yoanatul Hasanah Rahadian Zainul Rahmi Rahmi Rahmi, Fathaniah Raviqa Rahmi, Maulidia Arsyta Riga, Riga Risma Sari, Risma Rizki, Suci Yulia Sabrina, Joya Sapawe, Norzahir Sari, Trisna Kumala Septiani, Dhea Sherly Kasuma Warda Ningsih Sidik, Siti Munirah Sidiq, Aqil Marsya Simbolon, Ranita Sri Benti Etika Suryani, Okta Suryelita, Suryelita Syafri, Vanny Sofiana Syafriadi, Riko Utami, Esssylia Afriyanti Veronita, Silvi Wulandari, Yolanda Yanti, Fetria Rahayu Wendi Yuliani, Amelinda Zamanhuri, Norezatul Shahirah Ahmad Zulhendra, Zulhendra Zuyyina, Himla