Characterizing lignin: Combining lignin phenol, methoxy quantification, and dual stable carbon and hydrogen isotopic techniques
文献类型：期刊论文
| 作者 | Lee, Hyejung; Feng, Xiaojuan1; Mastalerz, Maria2; Feakins, Sarah J. |
| 刊名 | ORGANIC GEOCHEMISTRY
 |
| 出版日期 | 2019 |
| 卷号 | 136 |
| ISSN号 | 0146-6380 |
| 关键词 | Lignin Lignite Methoxy Stable carbon and hydrogen isotopes |
| DOI | 10.1016/j.orggeochem.2019.07.003 |
| 文献子类 | Article |
| 英文摘要 | Lignin is a major structural plant biochemical and biogeochemical compound present in peat and lignite. Its monomeric (phenolic) and polymeric structures include varying amounts of ether-bonded methyl groups (i.e., methoxy or -OCH3). These methoxy groups are generally underused targets for both structural characterization and isotopic analyses. We analyzed the quantity and C and H isotopic composition of methoxy groups within a range of substrates including lignin phenols, lignin, wood, peat, lignite, and sub-bituminous and bituminous coal. We used the Zeisel method to cleave the ether bonds with hydroiodic acid to yield iodomethane which can be analyzed by gas chromatography (GC). Finding inconsistent transfer and isotope effects associated with room temperature headspace injections, we instead used iso-octane as a solvent for the iodomethane analyte (the liquid method). Using the liquid method, we obtained a linear response by GC-flame ionization detection (GC-FID) for iodomethane and a linear calibration and 85 +/- 6% recovery of methyl from methoxy groups from solid standards of phenolic compounds of known stoichiometry. We introduced quantification via lignin phenolic compounds to calibrate both analytical and experimental yield. Methyl yields provided structural information and confirmed that lignin oxidation products (LOPs) from copper oxide oxidation underestimate the number of methoxy-bearing phenols (yield < 0.3 of expected based on stoichiometry); in combination the two approaches provide structural information and quantification. We found that concentrations of methyl from methoxy groups in geologic sediments (lignite, sub-bituminous and bituminous coal) initially increase with diagenesis as lignin to cellulose ratio increases, and then decline to low concentrations during coalification, offering new possibilities for characterizing the transformation of peat and lignite. We assessed an array of plant biochemicals and established that natural and synthetic methoxy groups span a broad range of dual stable carbon and hydrogen isotopic compositions indicating scope for biogeochemical and forensic applications. (C) 2019 Elsevier Ltd. All rights reserved. |
| 学科主题 | Geochemistry & Geophysics |
| 电子版国际标准刊号 | 1873-5290 |
| 出版地 | OXFORD |
| WOS关键词 | GEOGRAPHICAL ORIGIN ; DELTA-H-2 VALUES ; ORGANIC-MATTER ; RAPID METHOD ; WHOLE WOOD ; RATIOS ; CELLULOSE ; FRACTIONATION ; TEMPERATURES ; DELTA-C-13 |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000482176500004 |
| 资助机构 | American Chemical Society Petroleum Research FundAmerican Chemical Society [53747-ND2] ; USC Provost fellowship ; USC Earth Science Department graduate student research funding |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/19422]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.[Lee, Hyejung; Feakins, Sarah J.] Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90007 USA 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Indiana Univ, Indiana Geol & Water Survey, Bloomington, IN 47405 USA |
| 推荐引用方式 GB/T 7714 | Lee, Hyejung,Feng, Xiaojuan,Mastalerz, Maria,et al. Characterizing lignin: Combining lignin phenol, methoxy quantification, and dual stable carbon and hydrogen isotopic techniques[J]. ORGANIC GEOCHEMISTRY,2019,136. |
| APA | Lee, Hyejung,Feng, Xiaojuan,Mastalerz, Maria,&Feakins, Sarah J..(2019).Characterizing lignin: Combining lignin phenol, methoxy quantification, and dual stable carbon and hydrogen isotopic techniques.ORGANIC GEOCHEMISTRY,136. |
| MLA | Lee, Hyejung,et al."Characterizing lignin: Combining lignin phenol, methoxy quantification, and dual stable carbon and hydrogen isotopic techniques".ORGANIC GEOCHEMISTRY 136(2019). |
入库方式： OAI收割
来源：植物研究所
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