在分光光度法分析高浓度锌溶液中痕量钴离子浓度的过程中，由于基底离子Zn(II)与待测离子Co(II)化学性质相近，且基底离子浓度过高，导致Co(II)的光谱信号与Zn(II)的光谱信号重叠，溶液的吸光度与浓度在部分波长段呈现很强的非线性和不佳的加和性，因此无法通过全波段信息实现痕量Co(II)浓度的检测。本文提出了间隔-相关系数法对溶液的紫外可见光光谱进行波长点的筛选(In the process of spectrophotometric analysis of trace cobalt ion concentration in high concentration zinc solution, the base ion Zn(II) and the test ion Co(II) have similar chemical properties, and the base ion concentration is too high, resulting in Co(II) The spectral signal overlaps with the spectral signal of Zn(II), and the absorbance and concentration of the solution show strong nonlinearity and poor additivity over part of the wavelength band. Therefore, trace Co(II) concentrations cannot be achieved through the full band information. The test. In this paper, the interval-correlation method is proposed to screen the UV wavelength of the solution)