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Spectrophotometric Determination of Cadmium ( II ) Using 2 – ( 6 – Methyl – 2 – benzothiozolylazo ) – 4 – benzyl phenol | ||
| journal of al-qadisiyah for pure science(quarterly) | ||
| Article 1, Volume 7, Issue 1, 2007, Pages 248-258 PDF (0 K) | ||
| Author | ||
| Azhar A . Ghali | ||
| Abstract | ||
| Abstract The present paper describes the use of 2–( 6 – Methyl – 2 – benzothiozolylazo ) – 4 – benzyl phenol ( 6 – MeBTABP ) as a sensitive and selective analytical reagent for the spectrophotometric determination of cadmium ( II ) . ( 6 – MeBTABP ) reacts with cadmium ( II ) in the PH range (3 - 9 ) to from a colored complex shows a maximum absorbance at 598 nm . The calibration curve is linear between 1 and 20 μg . ml-1 cd ( II ) , detection limit of 0.7 μg . ml-1 with molar absorptivity and Sandal's sensitivity values of L 1056 mol-1 . 0.0045 cm-1 , μg . cm-2 , respectively . The composition of the Cd ( II ) - (6 – MeBTABP ) complex is established as 1 : 2 by molar ratio and conductivity measurement methods . An excellent linearity with a correlation coefficient value of ( 0.9999 ) is obtained for the complex . The relative standard deviation , recovery and relative error values of precision and accuracy of method were found to be R . S . D . % = % , Re % = % and Erel % = The stability constant of the complex calculated is L2 73 × 1010. m-2ol , at room temperature . The interferences of foreign ions on the determination of cadmium ( II ) and suitable masking agents were used . | ||
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