Characterization of kenaf (Hibiscus cannabinus) lignin by pyrolysis-gas chromatography-mass spectrometry in the presence of tetramethylammonium hydroxide
作者： Ken-ichi Kuroda , Akiko Izumi , Bibhuti B Mazumder , Yoshito Ohtani , Kazuhiko Sameshima
DOI: 10.1016/S0165-2370(02)00047-5
关键词: Ether 、 Kenaf 、 Organic chemistry 、 Pyrolysis–gas chromatography–mass spectrometry 、 Lignin 、 Tetramethylammonium hydroxide 、 Chemistry 、 Mass spectrometry 、 Pyrolysis 、 Bast fibre
摘要: Abstract Pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) in the presence of tetramethylammonium hydroxide (TMAH) was applied to kenaf ( Hibiscus cannabinus ) fibers order clarify chemical composition situ lignin. The core and bast samples obtained from middle position variety Chinpi-3 were pyrolyzed at 500 °C for 4 s with TMAH. pyrogram revealed peaks retaining structural attributes guaiacyl syringyl β-aryl ether subunits, dominated by subunit. Both pyrograms lacked products derived p -hydroxyphenyl Product distribution showed that: (1) lignin comprises 1.5 parts syringyl-, 1 part (2) subunits are present greater quantities than subunits. unit (S/G) ratios determined conventional pyrolysis alkaline CuO oxidation also supported TMAH/Py results. 4-Methoxy 3,4-dimethoxycinnamic acid methyl esters pyrolyzate absent pyrolyzate. 4-Methoxycinnamic ester esters.
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