Ma JH, BCIT School of Health Sciences, Environmental Health, Heacock H, Shaw F. DPD-based colorimetric quantification of free available chlorine (FAC) in floatation tank conditions. ephj [Internet]. 2017 May 1 [cited 2024 Nov. 21];. Available from: https://journals.bcit.ca/index.php/ehj/article/view/73