摘要
双波长β修正光度法是经过大量实验证实的一种有效的痕量金属分析方法，它能完全消除络合物反应中过量络合剂的影响，计算出络合产物的其实吸光度，进而建立络合物特征参数：组成比γ、真实摩尔吸光系数εｐ的计算方程。本文对Ｆｅ（Ⅲ）与二甲酚橙（ＸＯ）络合显色体系进行实验研究，结果表明其组成比γ＝１∶１，εｐ＝１．６３×１０４（Ｌ／ｍｏｌ．ｃｍ）。
Dual-wavelength beta-correctionn spectrophotometry is an updated method for determination of trace metal,It can completely eliminate the interference of the excess of a colorant from itsa metal coloured solution to give out the real absorbance of the formed chelate.By means of this beta-correction principle,the calculation equation of a chelates stoichiometric ratio(γ),and practical molar absorptivity(εp),etc,have been established,In this paper,the coloured reaction between Fe (Ⅲ) and XO has been utilized for the determination of the characteristic factors of Fe chelate with XO. The results showed that the formed complex is Fe(XO) and its εp=1.63×104L·mol(-1)·cm(-1).
出处
《光谱实验室》
CAS
CSCD
1995年第4期7-10,共4页
Chinese Journal of Spectroscopy Laboratory
