在这里，通过荧光激发-发射矩阵光谱 (EEM) 结合主成分系数，平行探索了源自城市化河流丘陵 (NDOM)、农村 (RDOM) 和城市 (UDOM) 地区的 DOM 的 Cu (II) 结合特征因子分析 (PARAFAC)、移动窗口二维相关光谱 (MW2DCOS) 和结构方程模型 (SEM)。 通过EEM-PARAFAC从滴定剂中提取出8种成分，即酚类物质（C1）、酪氨酸类物质（C2）、可见色氨酸类物质（C3）、紫外色氨酸类物质（C4）、近生生物生产（C5），废水衍生的有机物 (C6)、微生物类腐殖质 (C7) 和黄 …

2017年11月15日 · Modified versions of 2D-PCA-LDA, 2D-PCA-QDA and 2D-PCA-SVM have been proposed. Applications were performed for two-category classification using fluorescence EEM. The results show that 2D algorithms had equal or superior classification performance. Three-way data has been increasingly used in chemical applications.

2022年12月1日 · Combining EEM-PARAFAC with principal component coefficient, MW2DCOS and SEM is a practicable and promising approach for insight into the Cu (II) binding properties with DOM fractions. Eight components were extracted from DOM samples, ultraviolet tryptophan-like only occurred in RDOM, and tyrosine-like was found just in UDOM with Cu (II) addition.

2019年8月1日 · PARAFAC is able to convert 2D EEM data into 1D maximum fluorescence intensities (Fmax) of fluorescence components, which are the most important data in the EEM. By subjecting 1D Fmax data to 2DCOS analysis, the visualization issue of EEM-COS would be properly addressed.

在这项工作中，使用了三维激发-发射矩阵（3D-EEM）荧光光谱，并行因子分析（PARAFAC）和与同步荧光相集成的二维相关光谱（2D-COS），来研究土壤与土壤之间的相互作用。 在土壤吸附过程中获得的DOM和Pb（II）。 根据分批吸附实验的数据，土壤，土壤+ 5 mL DOM和土壤+ 10 mL DOM的吸附容量分别为16.96、18.29和19.32 mg g-1，这表明DOM显着提高了吸附效率。 的Pb（II）。 拟二级动力学方程可以很好地解释吸附过程。 吸附数据符合朗缪尔吸附等温线。 …

2017年12月21日 · The adsorption behaviors of different constituents within bulk humic substances (HS) on two nanoparticles, TiO 2 and ZnO, were examined by using two-dimensional correlation size exclusion chromatography (2D-CoSEC) and excitation emission matrix–parallel factor analysis (EEM-PARAFAC), which separated bulk HS into different size fractions and ...

Fluorescence spectroscopy is widely used in various industries, including life sciences. Two-dimensional (2D) fluorescence excitation-emission matrix (EEM) spectroscopy has been utilized for over 30 years to characterize or “fingerprint” biological samples. Historically, data acquisition was slow and required extensive corrections.

Three-dimensional excitation-emission matrix (EEM) fluorescence spectroscopy combined with parallel factor analysis (PARAFAC) and two-dimensional correlation spectroscopy (2D-COS) was applied to characterize structural composition and changes of the dissolved organic matter (DOM) in the urban river in Shenyang City.

2024年1月30日 · We summarize the principles of EEM to uncover DOM-metal association, including why fluorescence gets quenched and some potential mechanisms that affect the accuracy of fluorescence quenching.

同时，通过二维相关光谱（2D-COS）分析同步荧光光谱，与SOM相比，在两个湖泊中都观察到了SPOM相对较高的结合亲和力和更多的结合位点。 此外，FTIR光谱的2D-COS分析显示，对于SOM和SPOM而言，疏水基团（即酚基）的结合亲和力比亲水基团（即多糖基）更高。 我们的结果为了解浅湖中的悬浮颗粒提供了一个新的角度，这可能比以前认为的在重金属的环境行为中起着更为重要的作用。 沉积物有机物（SOM）和悬浮颗粒有机物（SPOM）的不同环境动力学会 …