Humic substances measurement in sludge dissolved organic matter: A critical assessment of current methods was written by Xiao, Keke;Horn, Harald;Abbt-Braun, Gudrun. And the article was included in Chemosphere in 2022.Product Details of 111-46-6 This article mentions the following:
The role of humic substances (HS) during sludge treatment has been the focus in recent years. Quantification of HS in sludge dissolved organic matter (DOM) and the chem. and structural characterization of HS data are the prerequisite for understanding their role during different sludge treatment processes. Currently, a number of published articles inadequately acknowledge fundamental principles of anal. methods both in terms of exptl. approach and data anal. Therefore, a more comprehensive and detailed description of the exptl. methods and the data anal. are needed. In this study, the current used methods for HS quantification in DOM of sludge had been tested for different calibration and sludge DOM samples. The results indicated that the current methods showed overestimated and contradictory results for HS quantification in sludge DOM. To be specific, using the modified Lowry method, different values were obtained depending on the humic acids used for calibration, and false neg. results were observed for some sludge samples. By using the relative amount of HS (based on dissolved organic carbon (DOC)) to total sludge DOM (based on DOC), variations among the results of different anal. methods for the same sample were high. According to the calculated Bray-Curtis dissimilarity indexes, the results for HS quantification obtained by three-dimensional excitation emission matrix (3D-EEM), either with spectra anal. methods by peak picking, fluorescence region integration (both region volume and area integration), or PARAllel FACtor anal. showed higher degrees of dissimilarity to those quantified by size exclusion liquid chromatog. or XAD-8 method. The selection of fluorescence regions for HS seemed to be the determining factor for overestimation obtained by the 3D-EEM technique. In future work, strategies, like a consistent terminol. of HS, the use of an internal standard sample, and the related standardized operation for HS quantification in sludge DOM need to be established. In the experiment, the researchers used many compounds, for example, 2,2′-Oxybis(ethan-1-ol) (cas: 111-46-6Product Details of 111-46-6).
2,2′-Oxybis(ethan-1-ol) (cas: 111-46-6) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Product Details of 111-46-6
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts