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Synthesis and Spectrophotometric Study of 4- (6- Nitro-2- benzothiazolylazo) Resorcinol as an Analytical Reagent for the Determination of Zinc. | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 20, 2014, Pages 493-500 | ||
| Authors | ||
| Abbas N. Al-Sharefy; Kasim H. Kadhim; Mohammed K. Khlool | ||
| Abstract | ||
| Abstract 4-( 6-Nitro-2-benzothiazolyl azo )resorcinol (6-Nitro BTAR) has been synthesized , and used as a reagent for the spectrophotometric determination of micrograms of zinc ions. This method sensitive, selective and rapid for reaction between Zn2+ and (6-Nitro BTAR), to form a brown complex having a molar ratio of 1:2 (Zn - 6-Nitro BTAR) at pH 6. The molar absorptivity of the complex is (5846 .7 L.mol-1.cm-1) at max 462.5 nm .Beer’s law is obeyed in the range of 0.2 –2.5 μg.ml-1 and the stability constant was found to be 1x108 L2.mole2-. The relative standard deviation, recovery and relative error values of method were found to be R.S.D% = 1.6, Re % = 98.84,and Erel % = -1.16. The most important interference were due to Hg2+,Cd2+,CrO42-, Ag+, Ni2+ and Co2+ , and suitable masking agents were used. The method was applied successfully for the determination of zinc in clay of shaat Al-Hilla. | ||
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