Spectrophotometric determination of Cadmium(II) with 2-[(6– Methyl–2- Benzothiazolylazo]-4-Chloro phenol Organic reagent
journal of kerbala university,
2007, Volume 3, Issue 3, Pages 248-255
AbstractAnew 2-[(6-Methyl-2-Benzothiazolyl)azo]-4-Chloro Phenol (6-MeBTAClP)Organic reagent was re-synthesized. A sensitive and selective spectrophotometric method was proposed for the rapid determination of Cd(II) by using (6-MeBTAClP) reagent.The reaction between Cd(II) and (6-MeBTAClP) reagent is instantaneous at pH=6.0, and the absorbance remains stable for over 24 h. The method allows for the determination of Cd(II) over the range (0.05 - 8.0)µg.ml-1,with molar absorptivity of( 1.23 x 104 )l.mol-1.cm-1 and a detection limit of 0.045 µg.ml-1 .Recovery and relative error values of precision and accuracy of method were found to be R.S.D%=0.302,Re%=98.67% ,and Erel=1.33% .Study of complex nature shows that ; (M: R) ratio was 1:2 at pH=6.0 ,and the stability constant of (0.926 x 1010) l2. mol-2 . The interferences of ions (CrO4-2,Pb+2 ,Hg+2 ,Zn+2,Cu+2, Ni+2, MoO4-2,WO4 -2) and masking agents effect on absorbance were studied.
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