Synthesis of the new 2-[(6-methyl-2- benzothiazolylazo]-4-chlorophenol organic reagent for spectrophotometric determination of copper (II)‎

الملخص EN

Anew 2-[(6-Methyl-2-Benzothiazolyl)azo]-4-Chloro Phenol (6-MeBTAClP)Organic reagent was synthesized.

A sensitive and selective spectrophotometric method was proposed for the rapid determination of Cu(II) by using (6-MeBTAClP) reagent.The reaction between Cu (II) and (6-MeBTAClP) reagent is instantaneous at pH = 4.0, and the absorbance remains stable for over 24 h.

The method allows for the determination of Cu(II) over the range (0.05 -4.0) μg.ml- 1, with molar absorptivity of (1.271 x 104) l.mol-1.cm-1 and a detection limit of 0.12 μg.ml-1.

Recovery and relative error values of precision and accuracy of method were found to be R.S.D % = 0.421, Re % = 98.67 %, and Erel = 1.33 %.

Study of complex nature shows that ; (m : r) ratio was 1 :2 at pH = 4.0, and the stability constant of (1.256 x 1010) l2.

mol-2.

The interferences of ions (CrO4 -2, Pb+2, Hg+2, Zn+2, Cd+2, Ni+2, MoO4-2,WO4 -2) and masking agents effect on absorbance were studied.