本文研究了锌、铁、铜在苯基荧光酮(PF)—Triton X—100体系中的析相显色反应特性及适宜条件,提出了用主成分分析法(PCA)处理配合物吸收光谱严重重叠的干扰作用,同时测定谷物、人发中的锌、铁、铜的方法。当样品中锌/铁、铜的比率大于4时,该方法结果令人满意。本文还讨论了PCA法中各参数取值时对未知样品预报结果准确度的影响。 In this paper, the characteristics of the chromatographic reaction of zinc, iron and copper in the phenylfluorone (PF) -Triton X-100 system and the suitable conditions were studied. It was also proposed that the absorption spectrum of the complex was treated by the principal component analysis (PCA) Overlapping interference, simultaneous determination of cereal, human hair in the zinc, iron, copper method. When the sample zinc / iron, copper ratio is greater than 4, the method results are satisfactory. The paper also discusses the influence of the parameters of PCA method on the accuracy of the prediction results of unknown samples.