可见区分光光度法测定水体色度的优化与应用

Improvement and Application of Spectrophotometry Method to Determinate Water Colority in Visible Spectrum

本研究将铂–钴标准溶液在可见光区的吸光度值用色度学中三刺激值表示,建立其方差与色度之间的数值关系,这一方法可用于测定任意水体的色度。为了找出这一色度法适用的色度范围,针对不同色度范围下拟合情况对比,将色度范围设置在0~100度。对比XYZ空间颜色匹配函数与铂–钴标准溶液吸光度曲线和τ(λ)的重叠情况,发现色度测定的偏差主要由长波段的干扰产生。实验证实优化波长范围将有效提高C-X、C-Y关系的相关度,从而明显提高色度测定的精度。

An improved universal method of determining the water colority of any kind is presented by numerical simulation between colority of Pt-Co standard solution and its chromatic tristimulus in visible region. It is recommended to simulate within 0 Hazen to 100 Hazens of Pt-Co standard solutions, by comparing simulations within different range of Pt-Co’s colority. By comparing CIE standard colorimetric observer matching functions with spectrum of Pt-Co standard solutions, it is found that relevance of C-Q simulation is more associated with C-Z than C-X or C-Y. At the meantime, simulations of C-X and C-Y during wave range of 560 - 780 nm show poor relevance which will reduce the accuracy of colority calculating. By removing this wave band while simulating, the accuracy of colority calculating will be improved effectively.