DETECTION OF NITRATES(V) AND SULFATES(VI) BY UV-VIS SPECTROPHOTOMETRY METHOD IN USED GREEN SAND BONDED BY BENTONITE WITH MODIFIED STARCH ADDITION. MaFE [Internet]. 2019 Oct. 9 [cited 2025 Dec. 10];42(4):203. Available from: https://journals.agh.edu.pl/mafe/article/view/2006