铝(Ⅲ)-铬偶氮酚KS配合物的吸附波

Application of the Polarographic Adsorptive Complex Waves of Aluminium(Ⅲ)-Chromazol KS

研究了铝(Ⅲ)-铬偶氮酚KS配合物及配位体在乙酸-乙酸铵缓冲溶液(pH6.1)的电化学行为,并探讨了有关机理。提出了痕量铝的测定方法,其线性范围为4～200ng/ml,检出限为1ng/ml。它可用于合金钢中铝的直接测定。

The electrochemical behaviours of the Al (Ⅲ)-Chromazol KS complex and the ligand have been investigated in HAc-NH Ac buffer solution (pH 6.1). The mechanism of related reactions is discussed. A new simple and sensitive single-sweep polarographic method is established for the determination of trace aluminium. The peak height of adsorptive complex wave is directly proportional to the concentration of Al(Ⅲ) in the range from 0.004 to 0.200 μg/ml, and the detection limit is 1.0ng/ml. The results of direct determination of trace aluminium in alloy steels are very satisfactory.