摘要
溶解有机物的含量是衡量水质的常用指标，利用荧光方法可以实现对自然水体溶解有机物的浓度进行高灵敏在线遥测。文章利用三维荧光光谱技术对溶解有机物进行了荧光表征，实验研究了溶解有机物浓度与荧光强度的关系，以及水体酸碱度和金属离子对荧光强度的影响。研究表明，当溶解有机物浓度在小于10mg·L^-1，pH值在6．5～7．5范围内时，荧光强度与浓度具有很好的线性关系；金属离子对溶解有机物诱导荧光有较大猝灭作用，不同金属离子对诱导荧光强度的猝灭效果有显著不同。
The concentration of dissolved organic matter（DOM） is an important index to assess natural water quality. Fluorescence measures can he used to scale the DOM loading in natural water in a highly sensitive, highly selective and online way. The relations between the Fluorescence intensity and the solution concentration, pH, and metal ion content were studied. The experiment results show that the fluorescence intensity and the solution concentration have a linear relationship when the concentration is below 10 mg·L^-1 and the pH is in the range of 6.5-7.5. The metal ions have a strong quenching effect on the fluorescence intensity of DOM, and the quenching effect is correlated with the coodination characters of the ions.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2006年第12期2283-2286,共4页
Spectroscopy and Spectral Analysis
基金
中国科学院知识创新工程重要方向项目(KGCX2-SW-111)资助
关键词
溶解有机物
三维荧光光谱
腐殖酸
荧光猝灭
Dissolved organic matter
Three-dimensional fluorescence spectroscopy
Humic acid
Fluorescence quenching
