Cite this article:
Abdulhameed M. Abdulhameed, Hussain J. Mohammed. Synthesis of 3-[3-Phenylpyrazylazo]-2, 7-naphthalendiol as new chromogenic reagent for the determination of Nickel (II) in nails of human. Research J. Pharm. and Tech 2018; 11(4): 1355-1360. doi: 10.5958/0974-360X.2018.00252.4