title: Quantitative HSQC Analyses of Lignin: A Practical Comparison.
abstract: Lignin is the second-most abundant polymer after cellulose within the biomass of our planet. Structurally, it displays random oligomeric units without fixed repetition schemes beyond the stage of dimers. Quantitative (1)H-(13)C HSQC measurements have recently greatly facilitated lignin analyses. In some cases, however, long acquisition times needed for obtaining quantitative HSQCs are not compatible with the chemical integrity of (a potentially functionalised) lignin sample. We thus compared different methods that were developed for more time-efficient quantitative HSQC measurements with respect to their usefulness in lignin analyses: reliable and reproducible results were obtained using both the QQ-HSQC and the HSQC0 method.
authors.affiliation: University of Rome 'Tor Vergata', Department of Chemical Sciences and Technologies, Via della Ricerca Scientifica, 00133 Rome, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Sette
authors.affiliation: University of Rome 'Tor Vergata', Department of Chemical Sciences and Technologies, Via della Ricerca Scientifica, 00133 Rome, Italy.
authors.forename: Heiko
authors.initials: H
authors.lastname: Lange
authors.affiliation: University of Rome 'Tor Vergata', Department of Chemical Sciences and Technologies, Via della Ricerca Scientifica, 00133 Rome, Italy.
authors.forename: Claudia
authors.initials: C
authors.lastname: Crestini
keywords: HSQC0; QQ-HSQC; natural polymer; quantitative heterocorrelated NMR; structure elucidation