Determination of hydroxyl groups in biorefinery resources via quantitative 31P NMR spectroscopy [Determination of hydroxyl groups in biorefinery resources via quantitative 31P Nuclear Magnetic Resonance Spectroscopy]

Meng, Xianzhi; Crestini, Claudia; Ben, Haoxi; Hao, Naijia; Pu, Yunqiao Joseph; Ragauskas, Arthur J.; Argyropoulos, Dimitris S.

doi:10.1038/s41596-019-0191-1

Title: Determination of hydroxyl groups in biorefinery resources via quantitative ³¹P NMR spectroscopy [Determination of hydroxyl groups in biorefinery resources via quantitative ³¹P Nuclear Magnetic Resonance Spectroscopy]

Journal Article · 07 August 2019 · Nature Protocols

DOI: https://doi.org/10.1038/s41596-019-0191-1 · OSTI ID:1558488

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The Univ. of Tennessee, Knoxville, TN (United States)
Ca’ Foscari Univ. of Venice, Venice (Italy)
Qingdao Univ., Qingdao (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Univ. of Tennessee Inst. of Agriculture, Knoxville, TN (United States)
North Carolina State Univ., Raleigh, NC (United States)

The analysis of chemical structural characteristics of biorefinery product streams (such as lignin and tannin) has advanced substantially over the past decade, with traditional wet-chemical techniques being replaced or supplemented by NMR methodologies. Quantitative ³¹P NMR spectroscopy is a promising technique for the analysis of hydroxyl groups because of its unique characterization capability and broad potential applicability across the biorefinery research community. This protocol describes procedures for (i) the preparation/solubilization of lignin and tannin, (ii) the phosphitylation of their hydroxyl groups, (iii) NMR acquisition details, and (iv) the ensuing data analyses and means to precisely calculate the content of the different types of hydroxyl groups. Compared with traditional wet-chemical techniques, the technique of quantitative ³¹P NMR spectroscopy offers unique advantages in measuring hydroxyl groups in a single spectrum with high signal resolution. Furthermore, the method provides complete quantitative information about the hydroxyl groups with small amounts of sample (~30 mg) within a relatively short experimental time (~30–120 min).

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1558488

Journal Information:: Nature Protocols, Vol. 14, Issue 9; ISSN 1754-2189

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 230 works

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