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Molecules

Title:		Siloxanes in Biogas: Approaches of Sampling Procedure and GC-MS Method Determination
Author(s):		Piechota G;
Address:		"GP CHEM, Laboratory of Biogas Research and Analysis, Legionow 40a/3, 87-100 Torun, Poland"
Journal Title:		Molecules
Year:		2021
Volume:		20210330
Issue:		7
Page Number:		-
DOI:		10.3390/molecules26071953
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"A new approach of siloxane sampling based on impinger, micro-impinger, adsorption on active carbon, and direct TedlarBag methods followed by gas chromatography-mass spectrometry (GC-MS) was developed for the analysis of three linear (L2-L4) and four cyclic (D3-D5) volatile methyl siloxanes (VMSs). Three kinds of organic liquid-medium characterized by different polarities, namely acetone, methanol, and d-decane as siloxanes trap were arranged in the experiment which is widely discussed below. Thus, the GC-MS equipped with SUPELCOWAX-10 capillary column was employed to perform monitoring of VMS content in the analyzed biogas samples originating from landfill, wastewater treatment plants, and agriculture biogas plants. In all samples that have undergone the analysis, cyclic and linear VMSs were found in quantities exceeding 107.9 and 3.8 mg/m(3), respectively. Significant differences between siloxanes concentrations depending on biogas origin were observed. Moreover, the high range of linearity (0.1 to 70.06 mg/m(3)), low LoD (0.01 mg/m(3)), low LoQ (0.04 mg/m(3)), and high recovery (244.1%) indicate that the procedure and can be applied in sensitive analyses of silica biogas contaminants. In addition to the above, the impinger method of sampling performed better than active-carbon Tube and TedlarBag, particularly for quantifying low concentrations of siloxanes. Overall, the evaluation of sampling methods for biogas collection simplified the analytical procedure by reducing the procedural steps, avoiding the use of solvents, as well as demonstrated its applicability for the testing of biogas quality"
Keywords:		Agriculture Biofuels/*analysis Siloxanes/*analysis Specimen Handling/*methods Volatile Organic Compounds/*analysis Wastewater/*chemistry Gc-ms biogas biomethane sampling siloxanes;
Notes:		"MedlinePiechota, Grzegorz eng GP CHEM. 07/2020./GP CHEM. Laboratory of Biogas Research & Analysis (Adress: ul. Legionow 40a/3, 87-100 Torun)/ Switzerland 2021/04/04 Molecules. 2021 Mar 30; 26(7):1953. doi: 10.3390/molecules26071953"