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All Journal MASALIQ: Jurnal Pendidikan dan Sains Gudang Jurnal Multidisiplin Ilmu
Sisri Wartati
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Pembuatan Virgin Coconut Oil (VCO) Menggunakan Metode Penggaraman Dengan NaCl Najla Dhifa Tofanny; Olga Tiara Rizki; Khalisa; Sisri Wartati; Desy Kurniawati; Arif Juliari Kusnanda
Gudang Jurnal Multidisiplin Ilmu Vol. 2 No. 6 (2024): GJMI - JUNI
Publisher : PT. Gudang Pustaka Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59435/gjmi.v2i6.660

Abstract

Virgin Coconut Oil (VCO) merupakan produk minyak kelapa murni yang proses pembuatannya tidak melibatkan proses pemanasan dan pengerjaannya pun sangat sederhana. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan garam NaCl terhadap hasil dan kualitas VCO. Hasil dari penelitian pada penambahan NaCl berbau minyak kelapa segar sesuai dengan ketentuan SNI. Pada uji bilangan asam didapatkan bahwa hasil analisis bilangan asam sebesar 0,11% pada minyak VCO kontrol maupun dengan penambahan NaCl. Kesimpulan pada perconaan ini diperoleh pada uji organoleptik didapat perbedaan yg signifikan dari kedua variasi, pada uji bilangan asam diperoleh hasil yang sama sebesar 0,11% dan untuk uji terakhir volume dari vco penggaraman lebih banyak dibandingan dengan kontrol.
Pengaruh Supporting Electrolyte terhadap Deteksi Ion Logam Pb(II) dan Cu(II) menggunakan PLE Termodifikasi Lapisan Tipis Perak dengan Metode Voltammetri Sisri Wartati; Trisna Kumala Sari
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6738

Abstract

This study aims to evaluate the effect of different supporting electrolytes on the detection sensitivity of Pb(II) and Cu(II) ions simultaneously using a Pencil Lead Electrode (PLE) modified with a thin silver layer via electrodeposition. The modification was carried out using a 5 mM AgNO₃ solution in 0.1 M KNO₃ through cyclic voltammetry, producing reduction and oxidation peaks at +0.2256 V and +0.5253 V, respectively, indicating successful silver deposition on the electrode surface. The supporting electrolyte variations included 0.1 M solutions of HNO₃, H₂SO₄, and HClO₄, tested for 1 mM Pb(II) and Cu(II) ion analysis. The voltammogram results showed that 0.1 M HNO₃ yielded the highest current responses 1.3550 mA for Pb(II) and 1.3305 mA for Cu(II) making it the most optimal supporting electrolyte. These differences are attributed to the ionic mobility and diffusion rate of the species toward the electrode surface. The findings demonstrate that the choice of supporting electrolyte significantly influences the performance of electrochemical sensors. This research contributes to the development of efficient, cost-effective, and sensitive PLE-based sensors for simultaneous heavy metal detection.
Co-Authors Arif Juliari Kusnanda DESY KURNIAWATI Khalisa Najla Dhifa Tofanny Olga Tiara Rizki Trisna Kumala Sari