摘要
前文报道了将CPA矩阵法用于有色配合物体系的运算,并较好地解决了微量铌和钽的光度同时测定问题。本文着重从配合物吸收光谱行为及矩阵运算角度分别探讨了CPA矩阵法和AKC矩阵法中波长选择对分析结果误差的影响。在前人有关钨、钼、钛单个元素光度测定研究的基础上,确立了适宜于钨、钼、钛-苯基荧光酮-溴代十六烷基三甲铵三元配合物同时光度测定的最佳条件,拟定了不经分离直接光度测定钨、钼、钦的方法。
The absorption spectra of W, Mo and Ti-phenylfluorone cetyltrimethylammonium
bromide complexes and the optimum conditions for the simultaneous spectrophotometric
determination of microamounts of W, Mo and Ti were studied. In order to examine the
effect of the errors of calibration matrix on the analytical resulte, the approach of
selecting the analytical wavelengths was investigated and the comparison of computation
results between AKC method (the matrix representation of Beer-Lambert's Law) and
CPA method (the inverse expression of Beer-Lambert's Law) at different wavelength
positions was made with their prediction errors. It showed that under experimental
conditions, both the accuracy and the pricision of the AKC method using 10 wavelengths
for determination were better than those of CPA method. The standard mixtures
containing microamounts of W, Mo and Ti in different concentration ratio were
determined with satisfactory results, thus the present method constitutes a simple and
fast method for the simultaneous determinabion of microamount of W, Mo and Ti.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1989年第1期84-88,共5页
Acta Chimica Sinica
基金
国家自然科学基金
