Simutaneous specttrophotometric determination of Ni2+, Zn2+ with xylenol organge in some industrial waters

Tóm tắt

The formation constants and the concentration of [M] and [ML_i] in complex solutions of Ni²⁺ and Zn²⁺ with xylenol orange were determined by spectrophotometric method and principal component analysis. In this way, the spectral data were used to calculate the formation constants of complexes between ions Ni²⁺ and Zn²⁺ with xylenol orange using algorithm of principal component analysis (PCA) in DATAN. The concentration values of Ni²⁺ and Zn²⁺ in synthetic solutions resulting from this technique using xylenol orange (XO) at pH 7.2 agree well with experimental data. This method can be applied to simultaneous determination of Ni²⁺ and Zn²⁺ in the industrial waste waters.