Paper Information

Journal:   IRANIAN JOURNAL OF CHEMISTRY AND CHEMICAL ENGINEERING (IJCCE)   2004 , Volume 23 , Number 1; Page(s) 65 To 71.
 
Paper: 

SOLVENT EXTRACTION AND SPECTROPHOTOMETRIC DETERMINATION OF MAGNESIUM BY PARATOLY 1-2-THENOHYDROXAMIC ACID AND QUINALIZARIN

 
 
Author(s):  DALLALI N.*, AGRAWAL Y.K.
 
* DEPARTMENT OF CHEMISTRY, FACULTY OF SCIENCES, ZANJAN UNIVERSITY, ZANAM, I.R IRAN
 
Abstract: 

Magnesium is extracted with a chloroform solution ofN-p-tolyl-2- thenohydroxamic acid (PTTHA) from aqueous solution ofpH9.5 .Mg-PTTHA complex is colourless and the colour is developed by adding quinalizarin into the extract. lmax and e of the complex are 590nm and 2.8×103Lmol-1cm-1 respectively. Most common ions do not interfere in the determination of magnesium. The spectral characteristics of magnesium complexes with hydroxamic acids are recorded. Magnesium is also determined by AAS and the results are in agreement with those of spectrophotometric method. The method is applied to the determination of magnesium in standard alloy samples.

 
Keyword(s): HYDROXAMIC ACID, MAGNESIUM, EXTRACTION SPECTROPHOTOMETRY
 
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