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样品制备技术对利格宁里埃变换红外光谱学的影响

Fredrik Heen Blindheim¹, Jost Ruwoldt¹

¹RISE PFI AS, Høgskoleringen 6B, 7491 Trondheim, Norway.

|July 14, 2023

概括

福里埃变换红外光谱法 (FTIR) 用于分析技术素功能组的方法进行了比较. 该KBr颗粒传输方法提供了卓越的光谱质量和精确的基基群量化.

科学领域:

生物聚合物的化学化学
光谱学分析的分析.
材料科学材料科学材料科学

背景情况:

由于功能组表征和量化方面的挑战,技术性素利用受到阻碍.
现有的素分析方法需要在速度,成本效益和可靠性方面进行改进.

研究的目的:

评估和比较三种福里埃变换红外光谱 (FTIR) 采样技术对技术性素.
确定最有效的方法来准确和可靠地量化功能组,特别是基基组.

主要方法:

研究了纯素粉末和DMSO-d6溶液的减弱总反射率 (ATR).
通过使用KBr颗粒法 (0.5 wt%) 评估传输FTIR.
通过各种方法比较光谱质量 (信号与噪声,分辨率) 和量化OH组.

主要成果:

与ATR方法相比,KBr颗粒传输产生了更高的光谱光滑性和分辨率.
整洁素的ATR是快速的,但其信号对噪声效应有限.
DMSO-d6溶液的ATR在30 wt%提供了可接受的信号对噪声.
对于性OH量化的最佳相关性 (R2 = 0.9995) 是KBr颗粒传输和整洁的ATR.
FTIR结果与定位和尺寸排除色谱 (SEC) 分析进行了比较.

结论:

建议采用KBr颗粒传输方法,通过FTIR可靠和准确地量化技术素中的基基.
由于pKa差异,非水性电位计定位可能会低估性OH组.
较低的数值平均分子量 (Mn) 与增加的OH含量相关.

关键词:

美国的FTIR是FTIR.这是一种KBr颗粒.减弱的总反射率减弱的总反射率卡夫特金的使用方法红色的线性蛋白质 (lignin) 是一种质素的表征质素的表征非水性电位计定位的非水性电位计定位.尺寸排除色谱法尺寸排除色谱苏打水的宁是什么?

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