Trisnawati, Ni, Krismayanti, Ni Putu, AND Vikana Suari, Putu. " VALIDASI METODE UJI AMONIA (NH3) MENGGUNAKAN SPEKTROFOTOMETER UV-VIS 2600" CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) [Online], Volume 12 Number 2 (31 October 2024)