The present paper proposes a new method of spectrophotometry based on linear combination of multiwavelength data by means of selecting a set of properly weighted coefficients and combination methods. It is clear that ...The present paper proposes a new method of spectrophotometry based on linear combination of multiwavelength data by means of selecting a set of properly weighted coefficients and combination methods. It is clear that the weighted combination absorbance attained is only in direct proportion to the concentration of the analysed component and independent of coexisting interferents.The accuracy of the analytical results is improved greatly for the analysis of light rare earths with the coexistence of heavy rare earths.The analyti- cal error from the reagent blank and co-coloration of light and heavy rare earths have also been overcome. The greatly improved linearity and additivity of absorbance are obtained.展开更多
在稀土-偶氮氯膦Ⅲ体系中,用回归正交法设计实验计划,测定多波长下的吸光度。借助微机得到如下形式的回归方程: A(λ)=b_o(λ)+sum from i=1 to N[b_i(λ)·X_i]+sum from j>i=1 to N [b_(ij)(λ)·X_i·X_j] 把样品的...在稀土-偶氮氯膦Ⅲ体系中,用回归正交法设计实验计划,测定多波长下的吸光度。借助微机得到如下形式的回归方程: A(λ)=b_o(λ)+sum from i=1 to N[b_i(λ)·X_i]+sum from j>i=1 to N [b_(ij)(λ)·X_i·X_j] 把样品的吸光度A(λ)代入,就可求得混合稀土中组分含量。本法所得结果的相对标准误差<6%,回收率为95—105%。F检验指出,在α=0.01的水平上方程显著。这说明本文提出的方法准确可靠。展开更多
文摘The present paper proposes a new method of spectrophotometry based on linear combination of multiwavelength data by means of selecting a set of properly weighted coefficients and combination methods. It is clear that the weighted combination absorbance attained is only in direct proportion to the concentration of the analysed component and independent of coexisting interferents.The accuracy of the analytical results is improved greatly for the analysis of light rare earths with the coexistence of heavy rare earths.The analyti- cal error from the reagent blank and co-coloration of light and heavy rare earths have also been overcome. The greatly improved linearity and additivity of absorbance are obtained.
文摘在稀土-偶氮氯膦Ⅲ体系中,用回归正交法设计实验计划,测定多波长下的吸光度。借助微机得到如下形式的回归方程: A(λ)=b_o(λ)+sum from i=1 to N[b_i(λ)·X_i]+sum from j>i=1 to N [b_(ij)(λ)·X_i·X_j] 把样品的吸光度A(λ)代入,就可求得混合稀土中组分含量。本法所得结果的相对标准误差<6%,回收率为95—105%。F检验指出,在α=0.01的水平上方程显著。这说明本文提出的方法准确可靠。