【摘要】 在pH9·3,乳化剂OP存在下,Zn2+,Cd2+,Co2+,Ni2+,Mn2+与5-Br-PADAP发生灵敏的显色反应,所形成的三元胶束络合物的吸收光谱严重重叠,单独测定相互干扰严重。本文将分光光度法与遗传算法相结合,对同一混合体系的总吸光度值进行解析,实现了5种组分的同时测定。模拟样品测定的相对误差一般小于±10%。更多还原

【Abstract】 A sensitive color reaction takes place for determination of trace Zn,Cd,Co,Ni,Mn with 2(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) in the presence of p-octyloplyethylenelycol phenylether (OP) at pH 9.3, to form a ternary micelle complex, of which the absorption spectras overlap seriously. A spectrophotometry combined with one of chemometrics techniques-genetic algorithms is adopted in order to determine Zn,Cd,Co,Ni and Mn. Through analysis of total absorbance values in a same system with using genetic algorithms, the simultaneous determination of Zn,Cd,Co,Ni and Mn is achieved. The method has been used to the determination of Zn,Cd,Co,Ni and Mn in synthetic solution. The relative error is 10% generally.更多还原