%0 Journal Article
%T Extraction-spectrophotometric determination of nickel at microgram level in water and wastewater using 2-[(2-mercaptophenylimino)methyl]phenol
%A A.M. Haji Shabani
%A S. Dadfarnia
%A Z. Shahbaazi
%A A.A. Jafari
%J Bulletin of the Chemical Society of Ethiopia
%D 2008
%I Chemical Society of Ethiopia
%X An extraction-spectrophotometric method for determination of nickel at sub ppm level using 2-[(2-mercaptophenylimino)methyl]phenol (MPMP) as the new extractant is described. The reagent reacts with nickel(II) at pH > 10 and form a 1:2 brown complex, which is extracted into chloroform. The complex has a maximum absorption at 421 nm with the molar absorptivity of 2.41 ¡Á 105 M-1 cm-1. Beer¡¯s law is obeyed over the range of 0.011-0.30 ¦̀g mL-1. The Sandell¡¯s sensitivity for 0.001 absorbance unit is 5.34 ¡Á 10-4 ¦̀g cm-2. The relative standard deviation at 0.018 ¦̀g mL-1 is 1.1 % (n = 8). The procedure was successfully applied to determination of nickel in wastewater and standard alloy and the accuracy was determined by recovery experiment, independent analysis by furnace-AAS, and analysis of a certified reference martial.   KEY WORDS: Ni determination, Liquid-liquid extraction, Schiff bases, Spectrophotometry   Bull. Chem. Soc. Ethiop. 2008, 22(3), 323-329.
%U http://www.ajol.info/index.php/bcse/article/view/61196