Improved quantitative analysis of molecular constituents of wastewater sludge pellets using double-shot thermochemolysis-GCMS was written by Collard, Marie;Teychene, Benoit;Lemee, Laurent. And the article was included in Journal of Analytical and Applied Pyrolysis in 2015.Electric Literature of C20H40O2 The following contents are mentioned in the article:
Pellets made from sewage sludge are a byproduct from wastewater, and understanding their composition is desirable to determine a suitable end use. Due to its relatively high content of lipids, sludge can be considered as a feedstock for biodiesel production, and this solvent-soluble fraction of OM has been widely studied. We assessed double-shot thermochemolysis-GCMS (gas chromatog. coupled with mass spectrometry) for its usefulness in efficiently characterizing the biodegradable and refractory fractions. Bulk- and mol.-level properties were analyzed using multiple conventional anal. techniques and compared with those of thermochemolysis-GCMS. Wastewater sludge pellets (WWSPs) were characterized using elemental anal., attenuated total reflectance Fourier transform IR spectroscopy, and thermogravimetric anal. Lipids were characterized using thin layer chromatog., proton NMR, and GCMS. Double-shot thermochemolysis-GCMS was used to characterize WWSPs at the mol. level, before or after lipid extraction Thermochemolysis-GCMS was done quant. Fatty acids and steroids were the main thermochemolysis products released by the first shot of lipids and of the raw sample. Aromatic compounds were the main thermochemolysis products from the second shot of residue and were also released by the second shot of the raw sample. The total amount of identified products of the first shot of lipids and the second shot of residue was 21 mg/g pellets. On the other hand, double-shot thermochemolysis-GCMS of the raw sample before lipid extraction gave access to 74 mg/g pellets. Moreover the relative percentages of the three classes of compounds were similar in both cases. Double-shot thermochemolysis-GCMS is an accurate and efficient method for characterizing WWSPs. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Electric Literature of C20H40O2).
Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Electric Literature of C20H40O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics