کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5161579 | 1502268 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The spectrometric characterization of lipids extracted from lignite samples from various coal basins
ترجمه فارسی عنوان
خصوصیات اسپکترومتر لیپیدهای استخراج شده از نمونه های زغال سنگ از حوضه های مختلف زغال سنگ
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کلمات کلیدی
لیپید، سنگ قیمتی، مواد هومیک، ماتریکس انتشار هیجانی، فلورفور،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Lipids were extracted from seven different lignite samples and subsequently characterized using spectrometric methods. Excitation-emission matrix (EEM) or total luminescence spectrometry was here used for the first time to study lipids extracted from lignites more extensively. Spectrometric characterization showed that lipids differ from each other depending on the origin of the lignite in which they occur. EEM spectra can be used as fingerprints not only for distinguishing between lipids but also lignites. Lipids contain fluorophores, which participate in the total fluorescence of lignites; some of these also participate in the fluorescence of humic substances. The typical maxima (260-275/370-440Â nm) of EEM lipid spectra lie within the Aâ² region, which can be ascribed to aromatic ring systems and steroids. Lipids from South Moravian lignite also contain maxima in the H (255/305Â nm) and V (430/475Â nm) regions, in contrast to other samples. The first could be related to single aromatic systems and substituents such as carboxyl and carbonyl and the latter is probably the result of intramolecular charge-transfer states.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Geochemistry - Volume 95, May 2016, Pages 34-40
Journal: Organic Geochemistry - Volume 95, May 2016, Pages 34-40
نویسندگان
LeoÅ¡ DoskoÄil, VojtÄch Enev, Miloslav PekaÅ, JaromÃr Wasserbauer,