Pengaruh Penambahan Iodine Terhadap Perilaku Elektro-kimia Pada Proses Ekstraksi Limbah Printed Circuit Board (PCB) Melalui Metode Cyclic Voltammetry dengan Media Pelarut Deep Eutectic Solvent (DES) Ethaline. = Effect of Iodine Addition on Electro-chemical Behavior in Printed Circuit Board (PCB) Waste Extraction process Through Cyclic Voltammetry Method with Deep Eutectic Solvent (DES) Ethaline Solvent Media.