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Synthesis and Spectrophotometric Study of 2-(6-Bromo-2- benzothiazolylazo)-4-chloro phenol as an Analytical Reagent for Determination of Copper. | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 19, 2014, Pages 331-338 | ||
| Authors | ||
| Aymen A. R. Jewad; Kasim H. Kadhim; Abbas N. Al-Sharefy | ||
| Abstract | ||
| Abstract 2-( 6-Bromo-2-benzothiazolylazo )-4-chloro phenol (6-Br-BTACl) has been synthesized , and used for the spectrophotometric determination of microgram amounts of copper. This method sensitive, selective and rapid for reaction between Cu+2 and (6-Br-BTACl), to form a green complex having a molar ratio of 1:2 (Cu-6-Br-BTACl) at pH 3.7. The molar absorptivity of the complex is (0.38x104 L.mol-1.cm-1) at max 636 nm. Beer’s law is obeyed in the range of 0.05 –1.2 µg.ml-1 and the stability constant was found to be 3.8x106 L2. mol-2. The relative standard deviation, recovery and relative error values of method were found to be R.S.D% = 2.4 , Re % = 96.5 and Erel % = -3.5 . The most important interference were due to Zn2+ ، Cd2+ ، Hg2+ ، Mg2+ ، Co2+ ، Ag+ ، Pb2+ ، Ca2+ ، CrO42- ، Bi3+، Ba2+ , WO42- ,and Ni2+, and suitable masking agents were used. The method was applied successfully for determination of copper in the serum of human blood. | ||
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