AHMED, M. F. A. and LINGAPPA, Y. (2011) “SPECTROPHOTOMETRIC DETERMINATION OF SELENIUM IN WATER, SOIL SAMPLES USING 2­ACETYL­5­CHLORO THIOPHENE, PHENYLENEDIAMINE”, International Journal of Chemistry Research, 2(3), pp. 46–48. Available at: https://www.ijcr.info/index.php/journal/article/view/46 (Accessed: 26 April 2025).