It is reported in this paper that by using the absorption spectrum of the interfering component as the denominator factor , the first derivative ratio spectra of the component mixture can be obtained , and the inter ference of one of the components can thus be eliminated 利用混合物的波譜除以干擾組分的波譜得比值波譜,對(duì)波長求導(dǎo)得比值導(dǎo)數(shù)波譜,由此可消除干擾組分的吸光度疊加效應(yīng)。