1.
PYROGALLOL AS A REAGENT FOR SPECTROPHOTOMETRIC DETERMINATION OF AMMONIUM-NITROGEN (NH -N) IN AQUEOUS SOLUTION: . Pakistan Journal of Scientific & Industrial Research. 2003;46(2):141-144. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1612