Illahi K, Yohandri Y, Darozat FM. Water pH Measurement Instrument using Titration Methods. Department of Physics, Universitas Negeri Padang [Internet]. 2024 Jun. 30 [cited 2024 Nov. 21];2(2). Available from: https://jeap.ppj.unp.ac.id/index.php/jeap/article/view/51