摘要
近几年来,导数分光光度法在无机物分析方面已做了一些工作,目前对宽吸收带体系应用导数技术的研究尚少见.这是由于宽吸收带体系经高阶求导后,信噪比明显下降,而低阶导数的分辨率又不高.本文探讨导数技术应用于宽吸收带体系的可能性及一般规律.一个高斯型谱带n次求导后,得到n个零点.这就为在低阶导数条件下消除干扰提供了条件,即在导数值的测量方法上寻找可能性.如果干扰组分的导数吸收曲线和基线相交处的波长恰好等于或接近待
Using a numerical simulation method based on pairs of overlapping Gaussian bands,we determined the criteria of zero crossing method for the 1st and 2nd derivative spectra.The mentioned method was used to determine the amount of La,Sc in La-Sc mixed compounds;Y,Sc in Y-Sc mixed compounds and RE,Th in RE-Th mixed compounds respectively.Satisfactory results were obtained and the creditability of theoretical criteria was demonstrated.
出处
《化学学报》
SCIE
CAS
1988年第6期590-594,共5页
Acta Chimica Sinica
基金
中国科学院科学基金
