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Synthesis And Spectrophotometric Study of 2-[(6-Nitro - -benzothiazolyl)azo]-4,5-diphenyl imidazole As Analytical Reagent For Determination Of Cadmium(п) | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 33, 2014, Pages 104-113 | ||
| Authors | ||
| Yussra O.Mussa; Khalid J.Al-adely | ||
| Abstract | ||
| Abstract A sensitive ,selective and rapid spectrophotometric method was used for the determination of trace amounts of cadmium ion by using the reagent 2-[(Nitro- -benzothiazolyl)azo]-4,5-diphenyl imidazole (6-NO2BTADI).This reagent reacts with Cd(п) in the pH rang (7.5-8.5) to from purle complex .Beer’s law is obeyed in the concentration range of (1-11)μg.ml-1 and the stability constant was found to be 5.11x108L2.mol-1.The molar absorptivity and sandell’s sensitivity values of Cd(п) complex were found to be 0.135 x 103 L2.mol-1.cm-1 and 2.2 x10-3 μg.cm-3 respectively at λmax 531 nm. The detection limit , relative standard deviation , relative errors and recovery values for this spectrophotometric method were found to be D.L=0.237 ;R.S.D%= 0.431 ; Erel%=2.85 ;Re %=97.14 .The stoichometry of metal to reagent (M:L)were 1:2 for Cd(п)-complex by using continuous variation and mole ratio. The most important interference were due to Co2+, Ni2+,Cr2+,Mg2+,Ca2+,Zn2+,Hg2+,Ba2+,WO42- and suitable masking agents were used tartaric acid ,oxalic acid ,citric acid and ascorbic acid | ||
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