?SPECTROPHOTOMETRIC DETERMINATION OF PA-LLADIUM (II) WITH RUBEANIC ACID (RA) IN PRESENCE OF PYRIDINE, PIPERIDINE AND 3-PICOLINE. Pakistan Journal of Scientific & Industrial Research. 1999;42(4):173-176. Accessed March 10, 2026. https://v2.pjsir.org/index.php/biological-sciences/article/view/2145