Volume 72, Issue 1 pp. 83-92
RESEARCH ARTICLE

A novel approach for quantitative determination of lignin content in tobacco via multiCP/MAS NMR spectroscopy

Ying Wang

Ying Wang

Department of Chemistry, University of Science and Technology of China, Hefei, China

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Lan Huang

Corresponding Author

Lan Huang

Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, China

Correspondence

Lan Huang, Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, 230601, China.

Email: [email protected]

Jun Yang, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.

Email: [email protected]

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Zhenfeng Tian

Zhenfeng Tian

Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, China

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Shaolin Ge

Shaolin Ge

Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, China

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Bing Zhang

Bing Zhang

Zhejiang Tobacco Quality Supervision and Testing Station, Hangzhou, China

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Zhao Zhang

Zhao Zhang

Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, China

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Mingxi Chen

Mingxi Chen

Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, China

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Bingxia Xu

Bingxia Xu

Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, China

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Jinghang Hao

Jinghang Hao

Anhui Provincial Key Laboratory of Aerosol Analysis, Regulation and Biological Effect, Institute of Advanced Technology, University of Science and Technology of China, Hefei, China

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Jun Yang

Corresponding Author

Jun Yang

Department of Chemistry, University of Science and Technology of China, Hefei, China

Anhui Provincial Key Laboratory of Aerosol Analysis, Regulation and Biological Effect, Institute of Advanced Technology, University of Science and Technology of China, Hefei, China

Correspondence

Lan Huang, Technology Center, China Tobacco Auhui Industrial Co., Ltd, Hefei, 230601, China.

Email: [email protected]

Jun Yang, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.

Email: [email protected]

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First published: 24 November 2024

Abstract

As the main structural component of tobacco cell wall, lignin content is an important factor affecting the safety of tobacco smoking. However, it is time-consuming to quantify lignin by conventional wet chemical analysis methods. In this work, a 13C multiCP/MAS NMR spectral analysis method for tobacco lignin was established. The multiCP/MAS NMR sequence was optimized for tobacco lignin. The optimized nuclear magnetic sequence parameters were 9 CP cycles of 1.5 ms, repolarization time of 0.7 s, and a total acquisition time of 130 min. Subsequently, TMSP was used as the internal standard substance to establish the working curve, and the correlation coefficient was 0.9946. The relative standard deviation (RSD, n = 5) was 3.26%. This method was applied to the determination of lignin content in different types of tobacco samples. The relative error in the determination of lignin content by this method did not exceed 4.46% compared to the results of the chemical method. The results showed that the 13C multiCP/MAS NMR spectral analysis method had the advantages of accuracy and rapidity, which provided a new technical means for the quantitative study of tobacco cell wall substances.

CONFLICT OF INTEREST STATEMENT

The authors declared no conflict of interest.

DATA AVAILABILITY STATEMENT

The data that supports the findings of this study are available in the supplementary material of this article.

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