报道了用流动注射氢化物发生原子吸收法(FI-HGAAS)对砷4种形态(As(Ⅲ),As(Ⅲ),DMA,MMA)的混合体系进行测量后,根据吸光度加和性原则,用因子分析法(TFA)对测定值进行解析,从而测定了混合体系中砷存在形态的数目、种类和含量.实验结果表明,不同酸度介质中不同形态砷校正曲线的斜率可作为相应的目标检验向量,应用于μg/L级低浓度砷的形态分析,平均回收率为93.9%,结果令人满意. It was reported that the four kinds of arsenic (As (Ⅲ), As (Ⅲ), DMA, MMA) mixed system were measured by flow injection hydride generation atomic absorption spectrometry (FI-HGAAS) The measured value was analyzed by factor analysis (TFA) to determine the number, species and content of arsenic present in the mixed system.The experimental results show that the slopes of different forms of arsenic calibration curves in different acidity media can be used as the corresponding target test Vector, which was applied to the morphological analysis of low concentration of arsenic in μg / L level with an average recovery of 93.9%. The results were satisfactory.