摘要
本文应用回归正交设计,与分光光度法结合,测定多个波长下的吸光度,得到吸光度与待测组分的浓度之间的回归方程组。将同样条件下测得的各波长下试样的吸光度值代入回归方程组求解,即可求得各待测组分在试样中的含量。应用这种方法,测定了五个稀土铝合金标准样中的镧、铈、钋和钕等四个主要稀土组分的含量,结果表明本方法是有效而可靠的。其相对标准偏差不超过8.6％。从而实现了用光度法在铝合金中同时测定四种主要稀土组分的目的。
In the present paper regressive-orthogonal design multiwavelength spectrophotmetry is applied to simultaneous determination of La, Ce, Pr and Nd in RE-A1 alloy using chlorophosp-hoanzo III. The reletive standard deviation of the results obtained by this method is less than 8.6%and percentage recovery is within 96-105%. With the help of computer the experiment plan is made and regressive equations and their regressive coefficients are calculated. The F-test shows that these regressive equations are remarkable at a =0.01 level. The method proposed in this paper is shown to be fast, accurate and reliable. This method can be used for the analysis of other interfering components without preseparation.
出处
《冶金分析》
CAS
CSCD
北大核心
1990年第5期10-14,共5页
Metallurgical Analysis
