Abstract
In the present work, aged cotton linters have been analyzed for their chromophore content according to the CRI (“chromophore release & identification”) method. Despite the very low contents in the ppb range, nine chromophores have been unambiguously identified, which makes this account the first one on defined chromophoric structures isolated from cotton. A common feature of the chromophores are 2-hydroxy-[1,4]benzoquinone, 2-hydroxyacetophenone and 5,8-dihydroxynaphthoquinone moieties, which resemble chromophoric structures found in other cellulosic substrates, such as bleached pulps or fibers. The finding of these compounds in lignin-free cotton linters confirms the previous hypothesis that those chromophores are formed from (oxidized) carbohydrate structures rather than from lignin fragments.
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Acknowledgments
We would like to thank the Austrian Christian-Doppler-Society for financial support through the “Christian Doppler Laboratory for Advanced Cellulose Chemistry and Analytics”.
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Rosenau, T., Potthast, A., Krainz, K. et al. Chromophores in cellulosics, VI. First isolation and identification of residual chromophores from aged cotton linters. Cellulose 18, 1623–1633 (2011). https://doi.org/10.1007/s10570-011-9585-0
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DOI: https://doi.org/10.1007/s10570-011-9585-0