“Determination of copper (II) by simple extraction procedure prior to differential pulse polarography using 4-(2-hydroxy phenyl ethaminodiol),benzene-”, GJSFR, vol. 10, no. 2, p. -, Jan. 2010, Accessed: Feb. 06, 2026. [Online]. Available: https://www.journalofscience.org/index.php/GJSFR/article/view/100004