导数分光光度法测定铝材着色槽液中微量铝

Derivative spectrophotometric determination of trace aluminium in the solution of coloring trough for aluminium products

提出了用一阶导数分光光度法测定铝材着色槽液中微量铝的方法 ,结果表明 ,在 pH5 0～ 7 0之间 ,乳化剂OP存在下 ,Al与铬天青S(CAS)形成稳定络合物 ,测定 6 33 0nm处的导数值 ,选择性大为提高 ,该方法用于铝材着色槽液中微量铝的测定 ,结果令人满意。

In this paper a new method of using first order derivative spectrophotometry to determine the trace aluminium content in the solution of coloring trough for aluminium products has been suggested The results indicate that in the presence of OP emulsifier at pH5 0-7 0 Al with CAS can form a stable complex,the maximum absorbance is at 633.0nm,It shows that the selectivity is increased by derivative spectrophotometry The results were proved to be satisfactory when such method was applied to determine trace aluminium in the entitled solution.