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<p>Carboxy groups on cellulose nanowhiskers (CNWs) were quantified using two dyes in four states (original and purified forms of both methylene blue (MB) and toluidine blue O (TBO)). Only purified TBO yielded satisfactory accuracy. Unpurified TBO resulted in overestimation, attributed to impurities (typically inorganic salts), whereas both unpurified and purified MB led to underestimation, for reasons that remain unknown.</p>

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Usability of different purified/unpurified cationic dyes for the quantitative determination of the anionic surface charge of cellulose nanowhiskers

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • Jun Araki

摘要

Carboxy groups on cellulose nanowhiskers (CNWs) were quantified using two dyes in four states (original and purified forms of both methylene blue (MB) and toluidine blue O (TBO)). Only purified TBO yielded satisfactory accuracy. Unpurified TBO resulted in overestimation, attributed to impurities (typically inorganic salts), whereas both unpurified and purified MB led to underestimation, for reasons that remain unknown.