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Electrodeposition and Characterization of Cobalt on Copper Electrodes in The Fabrication of Potentiometric Sensors For Phosphate Ion Siswoyo; Zulfikar; Chintya Maharani; Asnawati; Yeni Maulidah Muflihah; Tri Mulyono
Indonesian Chimica Letters Vol. 4 No. 2 (2025)
Publisher : Department of Chemistry, FMIPA, UNEJ

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Abstract

Determination of phosphate levels can be done using the potentiometric method with cobalt material-based electrodes with various techniques and compositions. This study uses copper metal as a supporting material. Surface coating of copper was carried out using solution of cobalt chloride and cobalt sulphate in various concentrations by applying voltammetric electrodeposition technique. The electrodes produced for each concentration of cobalt source were examined for the peak-reducing current. The potentiometric response was characterized using a standard phosphate solution, and the morphology using SEM. The best electrodes were used for soil phosphate analysis, and the results were compared with spectrometric methods. The results showed that the optimum concentration of cobalt source solution was characterized by the highest reduction peak of cobalt, namely at a concentration of 0.1 M. Electrodes made with chloride solution produced a higher peak of reduction current, had a sensitivity of -16.21 mV/decade which higher than that of electrodes from sulphate solution, namely -14.59 mV/decade in the phosphate concentration range of 0.001-1000 ppm. The morphology of the two types of electrodes also show differences, the electrode made of chloride material has a surface morphological structure that looks uneven and pretty rough, and there are oval grains that form like crystals and have a uniform shape. In contrast, the electrode made of sulphate material looks flatter and smooth and forms lumps. The results of the analysis of phosphate levels in the soil samples using the electrode are similar to the results of the analysis of the spectrophotometric method
Co-Authors Abda Abda Adnan Rafi Al Tahtawi Agustin, Agil Agustina Pradesa, Berliana ahmad yani Akbar Bayu Kresno Suharso Akhmad Maliki Alsiva, Vahimatul Andaryati Annikmah Farida anyprie, anyaprieynie Arman Asnawati Asnawati Asnawati Azhar Ramadhansah H Aria Aziziyah, Laili Ayu Baisrum Baskoro Setioputro Basuki, Pinky Issabella Nanda Brian Fadilah Budi Setiadi Chintya Maharani Dea Belinda Diana Nur Indah Purnamasari Dodi Wijaya Eka Nurzannah Eko Pramono Elsa Ilka Sasena Emawati Eni Rita Noviyana Ervizal AMZU Etik Winarni, Etik Fatqul Hajar Aswad Fawaid, Ahsana Fikri Sofhani Firdaus, Izzatul Habibah, Nailatul Hadjar Aswad, Fatqul Haikal Rayya Bramanta Halim, Abd Hari Purnama Hierdawati, Trie Ika Trisnawati A Ikhwanudin Imran Janah, Siti Miftaqul Laela, Nurul Luki Amar Hendrawati M. Badrun M. Muslih MahBengi, Surya Maimunah Noer Aini Mayesti, Indria MIFTAHUL JANNAH Mira Yunita Misbakhus Surur Muhamad Fahmy Mukarromah, Siti Murdiyati Mukti Mulia Hakam Mulyani, Rini Mustakim Nafiah, Sholihatin Naili, Naila Khoirun Nasri, Halik Neldawati, Rika Neldawaty, Rika Nigitha Novia Permatasari Nikmah Ranti Maulidah Ningtias, Nur Asri Fitri Rahmawati Nisa’, Kholifatun Nistiandani, Ana Noer, Mohammad Fahrudi Noor Farikhah Haneda Novita Andarini Novita Eka Tristiana Nugroho, Susetyo Nur Alfi Khotamin Nur Aliyah, Silvia NUR FITRIYAH Nur Hidayatul Istiqomah Nur Wahib Nur Widayati Ongky Alexander Pasanti, Jesicha Melni Prabawati, Tyas Putra, Iwan Eka Putri Zalsabila, Annisa Putri, Silvia Dwi Aprilia RAHMANTO WIBOWO, RAHMANTO ramadhan, firman Ratode, Hartato Kurniawan Ratu Anggraini Rismawan Adi Yunanto Rismawan Yunanto Rita Rahmawati Rizqi, M. Bicharur Rondhianto Rondhianto Rubiansyah, Getha Maharani Rustya, Dian Ryan Khusnuludin Rahman Sabir Sari, Dina Setia Indah Satriawan, Handi Dwi Senima, Isti Putri Setiawan, Mohamad Bayu Setya Budi Udrayana Shodikin, Mohammad Sinura, Zhindy Siti Rodiyah SN, Izzah Qoimatul Isti'adah Soemoenar Soeka Soepriyono Sofwan Adi Putra Sofwan Adiputra Sofwan Adiputra, Sofwan Sri Herawati Sri Wahyuni Suherman Suherman, Suherman Sujiah Putri, Ajeng Sulis Azizahroh Mahmudah SUMARNI Suminta Surahman, Yogi Toto Tohir Tri Mulyono Tri Mulyono Tri Yuni Hendrowati Umayanah USWATUN HASANAH Wahib, Nur Wantiyah Wantiyah Winata, Ahmad Pandu Yeni Maulidah Muflihah Yoseph Santosa Yulia Kurniawati Zulfikar