UV-spectrophotometry dataset of technical lignin in solution after aging and looped measurements

UV-spectrophotometry data of technical lignin samples in solutions is made available here, which was acquired after ambient aging for up to 110 days in DMSO solvent or looped measurements on fresh solutions in DMSO or 0.2N NaOH in water. UV-spectrophotometry of lignin is a useful technique, as it can a) quantify the concentration and purity of lignin in a given sample, b) determine the abundance of phenolic hydroxyl groups, and c) yield qualitative information about chemical modification of the lignin macromolecule. In addition, the technique is rapid and easy to use. Still, solutions of lignin are known to be unstable; in particular at high pH or in presence of UV-light. The data in this article may hence serve as guide in the experimental conduct and design, as it shows the reproducibility of UV-spectrophotometry measurements of lignin.本次公开的数据集包含溶液态工业木质素（technical lignin）样品的紫外分光光度法（UV-spectrophotometry）测试数据，采集自两类实验场景：一是将样品置于二甲基亚砜（DMSO）溶剂中常温老化最长达110天后的测试结果，二是对新鲜的DMSO溶液或0.2N氢氧化钠水溶液中的木质素溶液进行循环测量所得数据。木质素的紫外分光光度法是一项实用的分析技术，可实现以下应用：a）定量测定指定样品中木质素的浓度与纯度；b）检测酚羟基官能团的相对含量；c）获取木质素大分子化学改性的定性信息。此外，该技术具备操作快速、简便的优势。但需注意，木质素溶液存在不稳定性，尤其在高pH环境或紫外光照条件下更为显著。因此，本数据集可为木质素紫外分光光度测试的实验实施与方案设计提供参考，因其展现了该测量方法的可重复性。