Extraction-spectrophotometric determination of nickel at microgram level in water and wastewater using 2-[(2-mercaptophenylimino)methyl]phenol

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...

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Bibliographic Details
Published in:Bulletin of the Chemical Society of Ethiopia 2008-12, Vol.22 (3), p.323-329
Main Authors: Haji Shabani, A.M., Dadfarnia, S., Shahbaazi, Z., Jafari, A.A.
Format: Article
Language:English
Subjects:
Liquid-liquid extraction
Ni determination
Schiff bases
Spectrophotometry
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Summary: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 x 10 super(5) M super(-1) cm super(-1). Beer's law is obeyed over the range of 0.011-0.30 mu g mL super(-1). The Sandell's sensitivity for 0.001 absorbance unit is 5.34 x 10 super(-4) mu g cm super(-2). The relative standard deviation at 0.018 mu g mL super(-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.
ISSN:1011-3924
1011-3924
1726-801X
DOI:10.4314/bcse.v22i3.61196