水质色度的色差测量方法

Water Colority Determination Based on Color Difference

为了适应自动测量水质色度的要求，克服目前水质色度测量方法的局限性，提出了采用色差值测量水质色度的方法。实验建立了色差与色度之间的数值关系，通过测量水样的光谱透射比，计算色差值，就可得到水样色度值。系统经定标后测量过程不需要标准溶液，待测水样的颜色也不再受到限制。实际水样测量表明，测量结果与国家标准方法一致，且灵敏度更高，重复性更好。

For overcoming the limitation of the present water colority measurement method and meeting the requirement of measuring the water colority automatically, a measuring method of the water colority by color difference value is proposed. The relationship between color difference value and water colority value has been established by experiments, and the water colority value can be obtained based on the color difference value which calculated by measuring the spectral transmittance of water sample. Based on the proposed method, the calibrated system no longer needed the standard solutions during measurement and can be applied to measure any color of water sample. The measurements of natural water show that the measuring results are not only conforming to the measuring results by national standard method, but also higher sensitivity and better repetitiveness.