INVESTIGATION OF INTERACTION OF PHENYLTHIOUREA WITH MANGANESE (VII) AND CROMIUM (VI) AND DETERMINATION OF CROMIUM IN CROMIUM-CONTAINING ORE BY MEANS OF POTENTIOMETRIC TITRATION METHOD. (2010). Proceedings of the YSU B: Chemical and Biological Sciences, 44(1 (221), 23-28. https://doi.org/10.46991/PYSUB.2010.44.1.023