Warning: file_get_contents(https://ojs.journalbusiness.my/ojs.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in /var/www/ojs.unud.ac.id_backup/lib/pkp/includes/functions.inc.php on line 4 Trisnawati, N., Krismayanti, N., & Vikana Suari, P. 2024 Oct 31. VALIDASI METODE UJI AMONIA (NH3) MENGGUNAKAN SPEKTROFOTOMETER UV-VIS 2600. CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry). [Online] 12:2