相关实验视频

Updated: Jul 23, 2025

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

优化通过热分解分析红素的方法

Sergey Pokryshkin¹, Yuliya Sypalova¹, Artem Ivahnov¹

¹Core Facility Center "Arktika", Northern (Arctic) Federal University Named after M.V. Lomonosov Northern Dvina Emb., 17, 163002 Arkhangelsk, Russia.

|July 14, 2023

概括

准确量化素结构单元对于生物质加工至关重要. 这项研究优化了热分解方法,有利于直接样本热解-GC/MS进行精确的素分析.

科学领域:

生物质价值化和红素化学
分析化学和质谱学.

背景情况:

利格宁的单体单位比率对其加工潜力产生了重大影响.
精确量化素结构单元对于有效利用生物质至关重要.
常见的方法,如 pyrolytic 和热吸附分解,在精度上有局限性.

研究的目的:

为了研究样本重量,温度和持续时间对素结构单位量化的影响.
为了比较热溶解-GC/MS (TD-GC/MS) 和热解-GC/MS (Py-GC/MS) 对于素分析的有效性.
为了建立最佳条件,准确地确定素结构单元.

主要方法:

热溶解-GC/MS (TD-GC/MS) 和热解-GC/MS (Py-GC/MS) 技术的比较分析.
调查关键参数:样品重量,热分解温度和过程持续时间.
使用HSQC NMR作为S/G/H单位含量确定参考方法.

主要成果:

不同的热分解模式产生不同的产品成分,影响定量准确性.
确定了最佳条件:直接样本热解-GC/MS (DS-Py-GC/MS) 采用冷凝聚,样本重量为0.2-0.4毫克,加热从50°C到400°C,温度为120°C/分钟.
优化的方法证明了用于分析与原生结构非常相似的硬木木质素的适用性.

结论:

优化的DS-Py-GC/MS提供了一种可靠的方法,用于精确的素结构单位量化.
既定的条件提高了对素分析的精度,这对于生物质加工策略至关重要.
这种方法适用于特征硬木木质素,有助于先进的生物质利用.

关键词:

在HSQC NMR中,在PyGC/MS中使用.红色的线性蛋白质 (lignin) 是一种热破坏是一种热破坏.

更多相关视频

Comprehensive Compositional Analysis of Plant Cell Walls Lignocellulosic biomass Part I: Lignin

Comprehensive Compositional Analysis of Plant Cell Walls Lignocellulosic biomass Part I: Lignin

Published on: March 11, 2010

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Published on: March 9, 2021

相关概念视频

Sample Preparation for Analysis: Advanced Techniques

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...