Gomez等对金属离子与PAR生成的络合物使用多元线性回归程序扫描,建立了分光光度法同时测定二元,三元,四元混合物中的Cd、Co、Cu、Pb、Mn、Ni和Zn等二价金属离子的方法。Co、Mn、Ni和Zn的检测限是0.02μg/ml,Pb是0.10μg/ml。因为不需预分离、测定十分简单快速。已成功地将该法用于试样中上述离子的测定。本法是在对上述络合物的谱线,在450～600 nm波长范围内借助上述程序扫描,以混合吸收带的分辨为基础。使用HP8452A二极管阵列分光光度计及HPVES/12计算机 Gomez et al. Established a spectrophotometric method for the simultaneous determination of Cd, Co, Cu, Pb, Mn, Ni and Zn in binary, ternary and quaternary mixtures by using a complex linear regression procedure for the complex formation of metal ions with PAR Such as divalent metal ions. The detection limits for Co, Mn, Ni and Zn were 0.02 μg / ml and Pb was 0.10 μg / ml. Because no pre-separation, determination is very simple and fast. This method has been successfully used for the determination of the above ions in a sample. This method is based on the spectral line of the above complex, in the wavelength range of 450-600 nm by the above program scan, the hybrid absorption band based on the resolution. HP8452A diode array spectrophotometer and HPVES / 12 computer were used