Lundquist,林谦次郎等都曾用分光光度法研究了钴(II)与硫氰根的配位作用.最近,孙嘉彦等采用平衡移动法研究多级配合物体系时,log[A/(A_(max)—A)]=nlog[R]+logβ_n,作图应得一条曲线,只有当[R]在适当范围内才能使曲线斜率(配位比)接近整数.鉴于文献报道对硫氰酸钴(II)配合物的研究尚未完善,我们在紫外光谱区域,用改善了的方法,测定了硫氰酸钴(II)各级配合物的稳定常数和摩尔消光系数. Lundquist and Jiro Lin have all studied the coordination of cobalt (II) with thiocyanate by spectrophotometry. Recently, when using the equilibrium shift method, Sun Jiayan et al. (max) -A)] = nlog [R] + logβ_n, a curve should be plotted that approximates the slope of the curve (the complex ratio) only when [R] is within the appropriate range. Studies on the cobalt (II) complexes have not been completed yet. We have determined the stability constants and molar extinction coefficients of cobalt (II) thiocyanate complexes at various levels in the ultraviolet region using an improved method.