An Electrochemical Sensor of Theophylline on a Boron-Doped Diamond Electrode Modified with Nickel Nanoparticles. - Prastika Krisma Jiwanti; Anis Puspita Sari; Siti Wafiroh; Yeni Wahyuni Hartati; Jarnuzi Gunlazuardi; Yulia M. T. A. Putri; Takeshi Kondo; Qonita Kurnia Anjani (Sensors, 2023)