#beta#-Correction Spectrophotometric Determination of Gallium with Alizarine Red S

摘要

The detemination of gallium has been improved by #beta#-correction spectrophotometry with alizarine red S (ARS). #beta#-Correction spectrophotometry can eliminate completely the effect of excess ARS in its gallium colored solution to give out the real absorbance of Ga-ARS chelate. All of the analytical sensitivity,accuracy and presision were higher than those in the single wavelength method. By means of the #beta#-correction principle the characteristic parameters of the chelate can be determined acceptably. Beer's law was obeyed over the concentration range 0-1.0 mg/L Ga and the detection limit of Ga is 0.015 mg/L. This method has been applied to the analysis of environmental materials with satisfactory results.